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VIS Achromatic Doublets

DLB

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VIS Achromatic Doublets
In stock
SKU
DLB
Achromatic doublets are cemented achromats made of two different lenses (Low dispersion positive from crown glass and high dispersion negative from flint glass). The difference of dispersion and shape of both lenses are designed to minimize the chromatic aberrations in blue (486.1nm), green (546.1nm) and red (656.3nm). Therefore, these lenses are able to support the entire visible wavelength spectrum.
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Name Diameter φD Focal length Delivery Price Add to cart
i
Achromatic Doublet 25mm Diameter 222mm Focal Length
DLB-25-220PM 		25mm 222mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 222mm
Edge Thickness te 5.2mm
Center Thickness tc 6mm
Back focal length fb 218.9mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 60.2mm Focal Length
DLB-40-60PM 		40mm 60.2mm
1 week
£122.32
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 60.2mm
Edge Thickness te 11mm
Center Thickness tc 19.3mm
Back focal length fb 50.2mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 100.5mm Focal Length
DLB-50.8-100PM 		50.8mm 100.5mm
1 week
£152.20
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 100.5mm
Edge Thickness te 12.1mm
Center Thickness tc 19.9mm
Back focal length fb 90mm
Centration ＜1′
i
Achromatic Doublet 15mm Diameter 25.2mm Focal Length
DLB-15-25PM 		15mm 25.2mm
1 week
£86.33
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ15mm
Focal length f 25.2mm
Edge Thickness te 6mm
Center Thickness tc 8.8mm
Back focal length fb 20.7mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 40.9mm Focal Length
DLB-25.4-40PM 		25.4mm 40.9mm
1 week
£90.89
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 40.9mm
Edge Thickness te 7.6mm
Center Thickness tc 12.5mm
Back focal length fb 34.2mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 99.9mm Focal Length
DLB-40-100PM 		40mm 99.9mm
1 week
£121.93
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 99.9mm
Edge Thickness te 8.9mm
Center Thickness tc 13.7mm
Back focal length fb 92.8mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 200.1mm Focal Length
DLB-50.8-200PM 		50.8mm 200.1mm
1 week
£122.03
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 200.1mm
Edge Thickness te 9.5mm
Center Thickness tc 13.3mm
Back focal length fb 193.3mm
Centration ＜1′
i
Achromatic Doublet 15mm Diameter 50.1mm Focal Length
DLB-15-50PM 		15mm 50.1mm
1 week
£81.68
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ15mm
Focal length f 50.1mm
Edge Thickness te 5mm
Center Thickness tc 6.3mm
Back focal length fb 47.1mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 69.9mm Focal Length
DLB-25.4-70PM 		25.4mm 69.9mm
1 week
£88.57
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 69.9mm
Edge Thickness te 6.2mm
Center Thickness tc 9mm
Back focal length fb 65.3mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 169.7mm Focal Length
DLB-40-170PM 		40mm 169.7mm
1 week
£106.90
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 169.7mm
Edge Thickness te 7.5mm
Center Thickness tc 10.3mm
Back focal length fb 164.5mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 400mm Focal Length
DLB-50.8-400PM 		50.8mm 400mm
6-12 weeks
£122.03
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 400mm
Edge Thickness te 8.3mm
Center Thickness tc 10.2mm
Back focal length fb 394.7mm
Centration ＜1′
i
Achromatic Doublet 15mm Diameter 79.9mm Focal Length
DLB-15-80PM 		15mm 79.9mm
1 week
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ15mm
Focal length f 79.9mm
Edge Thickness te 4.7mm
Center Thickness tc 5.5mm
Back focal length fb 77.1mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 119.8mm Focal Length
DLB-25.4-120PM 		25.4mm 119.8mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 119.8mm
Edge Thickness te 5.6mm
Center Thickness tc 7.2mm
Back focal length fb 116.2mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 249.1mm Focal Length
DLB-40-250PM 		40mm 249.1mm
1 week
£106.90
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 249.1mm
Edge Thickness te 6.9mm
Center Thickness tc 8.8mm
Back focal length fb 244.6mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 1000mm Focal Length
DLB-50.8-1000PM 		50.8mm 1000mm
6-12 weeks
£122.03
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 1000mm
Edge Thickness te 7.5mm
Center Thickness tc 8.3mm
Back focal length fb 995.1mm
Centration ＜3′
i
Achromatic Doublet 20mm Diameter 40.1mm Focal Length
DLB-20-40PM 		20mm 40.1mm
6-12 weeks
£88.57
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 40.1mm
Edge Thickness te 6.2mm
Center Thickness tc 9.2mm
Back focal length fb 35.3mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 200.1mm Focal Length
DLB-25.4-200PM 		25.4mm 200.1mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 200.1mm
Edge Thickness te 5.1mm
Center Thickness tc 6.1mm
Back focal length fb 197mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 399.7mm Focal Length
DLB-40-400PM 		40mm 399.7mm
1 week
£106.90
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 399.7mm
Edge Thickness te 6.4mm
Center Thickness tc 7.6mm
Back focal length fb 395.7mm
Centration ＜1′
i
Achromatic Doublet 60mm Diameter 250mm Focal Length
DLB-60-250PM 		60mm 250mm
6-12 weeks
£1,999.27
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ60mm
Focal length f 250mm
Edge Thickness te 10mm
Center Thickness tc 14.3mm
Back focal length fb 242.8mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 70.1mm Focal Length
DLB-20-70PM 		20mm 70.1mm
1 week
£82.75
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 70.1mm
Edge Thickness te 5.2mm
Center Thickness tc 6.9mm
Back focal length fb 66.7mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 300mm Focal Length
DLB-25.4-300PM 		25.4mm 300mm
6-12 weeks
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 300mm
Edge Thickness te 5mm
Center Thickness tc 5.6mm
Back focal length fb 296.6mm
Centration ＜3′
i
Achromatic Doublet 50mm Diameter 81mm Focal Length
DLB-50-80PM 		50mm 81mm
1 week
£146.96
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 81mm
Edge Thickness te 13.4mm
Center Thickness tc 22.9mm
Back focal length fb 69.1mm
Centration ＜1′
i
Achromatic Doublet 80mm Diameter 149.7mm Focal Length
DLB-80-150PM 		80mm −149.7mm
6-12 weeks
£2,400.95
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ80mm
Focal length f 149.7mm
Edge Thickness te 17.2mm
Center Thickness tc 30.3mm
Back focal length fb 133.6mm
Centration ＜1′
i
Achromatic Doublet 10mm Diameter 20mm Focal Length
DLB-10-20PM 		10mm 20mm
6-12 weeks
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ10mm
Focal length f 20mm
Edge Thickness te 5.1mm
Center Thickness tc 6.7mm
Back focal length fb 16.6mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 120.3mm Focal Length
DLB-20-120PM 		20mm 120.3mm
6-12 weeks
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 120.3mm
Edge Thickness te 4.7mm
Center Thickness tc 5.7mm
Back focal length fb 117.3mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 70.8mm Focal Length
DLB-30-70PM 		30mm 70.8mm
1 week
£102.63
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 70.8mm
Edge Thickness te 7.7mm
Center Thickness tc 11.5mm
Back focal length fb 65mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 150.7mm Focal Length
DLB-50-150PM 		50mm 150.7mm
1 week
£135.22
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 150.7mm
Edge Thickness te 10.5mm
Center Thickness tc 15.5mm
Back focal length fb 142.8mm
Centration ＜1′
i
Achromatic Doublet 80mm Diameter 502.6mm Focal Length
DLB-80-500PM 		80mm 502.6mm
6-12 weeks
£2,400.95
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ80mm
Focal length f 502.6mm
Edge Thickness te 10.7mm
Center Thickness tc 14.5mm
Back focal length fb 494.9mm
Centration ＜1′
i
Achromatic Doublet 10mm Diameter 40mm Focal Length
DLB-10-40PM 		10mm 40mm
6-12 weeks
£64.12
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ10mm
Focal length f 40mm
Edge Thickness te 4.6mm
Center Thickness tc 5.3mm
Back focal length fb 37.5mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 200.1mm Focal Length
DLB-20-200PM 		20mm 200.1mm
1 week
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 200.1mm
Edge Thickness te 4.5mm
Center Thickness tc 5.1mm
Back focal length fb 197.3mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 300mm Focal Length
DLB-20-300PM 		20mm 300mm
6-12 weeks
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 300mm
Edge Thickness te 4.3mm
Center Thickness tc 4.7mm
Back focal length fb 297.1mm
Centration ＜3′
i
Achromatic Doublet 30mm Diameter 120.1mm Focal Length
DLB-30-120PM 		30mm 120.1mm
1 week
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 120.1mm
Edge Thickness te 6.6mm
Center Thickness tc 8.8mm
Back focal length fb 115.7mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 220.7mm Focal Length
DLB-50-220PM 		50mm 220.7mm
1 week
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 220.7mm
Edge Thickness te 9.3mm
Center Thickness tc 12.7mm
Back focal length fb 214.5mm
Centration ＜1′
i
Achromatic Doublet 100mm Diameter 297.3mm Focal Length
DLB-100-300PM 		100mm 297.3mm
6-12 weeks
£2,802.63
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ100mm
Focal length f 297.3mm
Edge Thickness te 18mm
Center Thickness tc 28mm
Back focal length fb 283.2mm
Centration ＜1′
i
Achromatic Doublet 10mm Diameter 69.9mm Focal Length
DLB-10-70PM 		10mm 69.9mm
1 week
£56.07
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ10mm
Focal length f 69.9mm
Edge Thickness te 4.3mm
Center Thickness tc 4.7mm
Back focal length fb 67.3mm
Centration ＜1′
i
Achromatic Doublet 25mm Diameter 60.1mm Focal Length
DLB-25-60PM 		25mm 60.1mm
1 week
£90.89
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 60.1mm
Edge Thickness te 6.7mm
Center Thickness tc 9.8mm
Back focal length fb 55.2mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 200.2mm Focal Length
DLB-30-200PM 		30mm 200.2mm
6-12 weeks
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 200.2mm
Edge Thickness te 6mm
Center Thickness tc 7.3mm
Back focal length fb 196.4mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 350.2mm Focal Length
DLB-50-350PM 		50mm 350.2mm
1 week
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 350.2mm
Edge Thickness te 8.6mm
Center Thickness tc 10.7mm
Back focal length fb 344.5mm
Centration ＜1′
i
Achromatic Doublet 100mm Diameter 998.1mm Focal Length
DLB-100-1000PM 		100mm 998.1mm
6-12 weeks
£2,802.63
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ100mm
Focal length f 998.1mm
Edge Thickness te 13.1mm
Center Thickness tc 16.1mm
Back focal length fb 989.7mm
Centration ＜1′
i
Achromatic Doublet 12.7mm Diameter 25.1mm Focal Length
DLB-12.7-25PM 		12.7mm 25.1mm
1 week
£82.75
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ12.7mm
Focal length f 25.1mm
Edge Thickness te 5.3mm
Center Thickness tc 7.3mm
Back focal length fb 21.5mm
Centration ＜1′
i
Achromatic Doublet 25mm Diameter 100.2mm Focal Length
DLB-25-100PM 		25mm 100.2mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 100.2mm
Edge Thickness te 5.9mm
Center Thickness tc 7.7mm
Back focal length fb 96.5mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 300.4mm Focal Length
DLB-30-300PM 		30mm 300.4mm
in stock
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 300.4mm
Edge Thickness te 5.7mm
Center Thickness tc 6.6mm
Back focal length fb 296.9mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 500.3mm Focal Length
DLB-50-500PM 		50mm 500.3mm
6-12 weeks
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 500.3mm
Edge Thickness te 8.1mm
Center Thickness tc 9.6mm
Back focal length fb 495.2mm
Centration ＜1′
i
Achromatic Doublet 12.7mm Diameter 50.1mm Focal Length
DLB-12.7-50PM 		12.7mm 50.1mm
1 week
£68.68
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ12.7mm
Focal length f 50.1mm
Edge Thickness te 4.7mm
Center Thickness tc 5.7mm
Back focal length fb 47.3mm
Centration ＜1′
i
Achromatic Doublet 25mm Diameter 170.4mm Focal Length
DLB-25-170PM 		25mm 170.4mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 170.4mm
Edge Thickness te 5.3mm
Center Thickness tc 6.4mm
Back focal length fb 167.1mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 450mm Focal Length
DLB-30-450PM 		30mm 450mm
6-12 weeks
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 450mm
Edge Thickness te 5.5mm
Center Thickness tc 6.1mm
Back focal length fb 446.5mm
Centration ＜3′
i
Achromatic Doublet 50mm Diameter 800mm Focal Length
DLB-50-800PM 		50mm 800mm
1 week
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 800mm
Edge Thickness te 7.7mm
Center Thickness tc 8.6mm
Back focal length fb 794.9mm
Centration ＜3′
i
Achromatic Doublet 12.7mm Diameter 79.9mm Focal Length
DLB-12.7-80PM 		12.7mm 79.9mm
6-12 weeks
£68.68
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ12.7mm
Focal length f 79.9mm
Edge Thickness te 4.5mm
Center Thickness tc 5.1mm
Back focal length fb 77.4mm
Centration ＜1′
i
Achromatic Doublet 25mm Diameter 250.8mm Focal Length
DLB-25-250PM 		25mm 250.8mm
6-12 weeks
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 250.8mm
Edge Thickness te 5.1mm
Center Thickness tc 5.8mm
Back focal length fb 247.7mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 70.3mm Focal Length
DLB-40-70PM 		40mm 70.3mm
1 week
£122.32
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 70.3mm
Edge Thickness te 10.2mm
Center Thickness tc 17.2mm
Back focal length fb 61.7mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 120.2mm Focal Length
DLB-50.8-120PM 		50.8mm 120.2mm
6-12 weeks
£144.63
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 120.2mm
Edge Thickness te 11.2mm
Center Thickness tc 17.7mm
Back focal length fb 111mm
Centration ＜1′
i
Achromatic Doublet 15mm Diameter 30.1mm Focal Length
DLB-15-30PM 		15mm 30.1mm
1 week
£86.33
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ15mm
Focal length f 30.1mm
Edge Thickness te 5.7mm
Center Thickness tc 8mm
Back focal length fb 26mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 50.1mm Focal Length
DLB-25.4-50PM 		25.4mm 50.1mm
in stock
£90.89
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 50.1mm
Edge Thickness te 7mm
Center Thickness tc 10.9mm
Back focal length fb 44.9mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 120mm Focal Length
DLB-40-120PM 		40mm 120mm
1 week
£110.68
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 120mm
Edge Thickness te 8.3mm
Center Thickness tc 12.3mm
Back focal length fb 113.7mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 249.4mm Focal Length
DLB-50.8-250PM 		50.8mm 249.4mm
6-12 weeks
£122.03
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 249.4mm
Edge Thickness te 9mm
Center Thickness tc 12.1mm
Back focal length fb 243.4mm
Centration ＜1′
i
Achromatic Doublet 15mm Diameter 59.9mm Focal Length
DLB-15-60PM 		15mm 59.9mm
1 week
£76.15
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ15mm
Focal length f 59.9mm
Edge Thickness te 4.8mm
Center Thickness tc 5.9mm
Back focal length fb 57mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 80mm Focal Length
DLB-25.4-80PM 		25.4mm 80mm
1 week
£88.57
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 80mm
Edge Thickness te 6.1mm
Center Thickness tc 8.5mm
Back focal length fb 75.9mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 199.7mm Focal Length
DLB-40-200PM 		40mm −199.7mm
1 week
£106.90
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 199.7mm
Edge Thickness te 7.2mm
Center Thickness tc 9.6mm
Back focal length fb 194.8mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 500.3mm Focal Length
DLB-50.8-500PM 		50.8mm 500.3mm
6-12 weeks
£122.03
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 500.3mm
Edge Thickness te 8.1mm
Center Thickness tc 9.6mm
Back focal length fb 495.2mm
Centration ＜1′
i
Achromatic Doublet 15mm Diameter 100mm Focal Length
DLB-15-100PM 		15mm 100mm
1 week
£64.12
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ15mm
Focal length f 100mm
Edge Thickness te 4.5mm
Center Thickness tc 5.2mm
Back focal length fb 97.3mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 149.6mm Focal Length
DLB-25.4-150PM 		25.4mm 149.6mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 149.6mm
Edge Thickness te 5.4mm
Center Thickness tc 6.7mm
Back focal length fb 146.2mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 300.5mm Focal Length
DLB-40-300PM 		40mm 300.5mm
1 week
£106.90
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 300.5mm
Edge Thickness te 6.7mm
Center Thickness tc 8.3mm
Back focal length fb 296.1mm
Centration ＜1′
i
Achromatic Doublet 60mm Diameter 170.8mm Focal Length
DLB-60-170PM 		60mm 170.8mm
6-12 weeks
£1,999.27
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ60mm
Focal length f 170.8mm
Edge Thickness te 11.4mm
Center Thickness tc 17.7mm
Back focal length fb 161.9mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 50.2mm Focal Length
DLB-20-50PM 		20mm 50.2mm
1 week
£88.57
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 50.2mm
Edge Thickness te 5.7mm
Center Thickness tc 8.1mm
Back focal length fb 46mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 222mm Focal Length
DLB-25.4-220PM 		25.4mm 222mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 222mm
Edge Thickness te 5.1mm
Center Thickness tc 6mm
Back focal length fb 218.9mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 450mm Focal Length
DLB-40-450PM 		40mm 450mm
1 week
£106.90
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 450mm
Edge Thickness te 6.3mm
Center Thickness tc 7.4mm
Back focal length fb 445.5mm
Centration ＜3′
i
Achromatic Doublet 60mm Diameter 499.1mm Focal Length
DLB-60-500PM 		60mm 499.1mm
6-12 weeks
£1,999.27
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ60mm
Focal length f 499.1mm
Edge Thickness te 8.6mm
Center Thickness tc 10.7mm
Back focal length fb 493.5mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 79.9mm Focal Length
DLB-20-80PM 		20mm 79.9mm
1 week
£76.15
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 79.9mm
Edge Thickness te 5.1mm
Center Thickness tc 6.6mm
Back focal length fb 76.6mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 50.3mm Focal Length
DLB-30-50PM 		30mm 50.3mm
1 week
£102.63
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 50.3mm
Edge Thickness te 8.6mm
Center Thickness tc 14.1mm
Back focal length fb 43.5mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 100.5mm Focal Length
DLB-50-100PM 		50mm 100.5mm
1 week
£146.96
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 100.5mm
Edge Thickness te 12.3mm
Center Thickness tc 19.9mm
Back focal length fb 90mm
Centration ＜1′
i
Achromatic Doublet 80mm Diameter 200.8mm Focal Length
DLB-80-200PM 		80mm 200.8mm
6-12 weeks
£2,400.95
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ80mm
Focal length f 200.8mm
Edge Thickness te 14.7mm
Center Thickness tc 24.3mm
Back focal length fb 188.2mm
Centration ＜1′
i
Achromatic Doublet 10mm Diameter 25mm Focal Length
DLB-10-25PM 		10mm 25mm
1 week
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ10mm
Focal length f 25mm
Edge Thickness te 4.9mm
Center Thickness tc 6.1mm
Back focal length fb 22.1mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 149.8mm Focal Length
DLB-20-150PM 		20mm 149.8mm
6-12 weeks
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 149.8mm
Edge Thickness te 4.6mm
Center Thickness tc 5.4mm
Back focal length fb 147mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 80.3mm Focal Length
DLB-30-80PM 		30mm 80.3mm
1 week
£97.97
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 80.3mm
Edge Thickness te 7.4mm
Center Thickness tc 10.7mm
Back focal length fb 75mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 169.8mm Focal Length
DLB-50-170PM 		50mm 169.8mm
1 week
£129.50
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 169.8mm
Edge Thickness te 10.1mm
Center Thickness tc 14.5mm
Back focal length fb 162.5mm
Centration ＜1′
i
Achromatic Doublet 80mm Diameter 800.6mm Focal Length
DLB-80-800PM 		80mm 800.6mm
6-12 weeks
£2,400.95
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ80mm
Focal length f 800.6mm
Edge Thickness te 9.7mm
Center Thickness tc 12.1mm
Back focal length fb 794.2mm
Centration ＜1′
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Achromatic Doublet 10mm Diameter 50mm Focal Length
DLB-10-50PM 		10mm 50mm
1 week
£59.95
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ10mm
Focal length f 50mm
Edge Thickness te 4.4mm
Center Thickness tc 5mm
Back focal length fb 47.5mm
Centration ＜1′
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Achromatic Doublet 20mm Diameter 220mm Focal Length
DLB-20-220PM 		20mm 220mm
6-12 weeks
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 220mm
Edge Thickness te 4.5mm
Center Thickness tc 5mm
Back focal length fb 216.9mm
Centration ＜3′
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Achromatic Doublet 25mm Diameter 40.9mm Focal Length
DLB-25-40PM 		25mm 40.9mm
6-12 weeks
£90.89
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 40.9mm
Edge Thickness te 7.7mm
Center Thickness tc 12.5mm
Back focal length fb 34.2mm
Centration ＜1′
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Achromatic Doublet 30mm Diameter 150mm Focal Length
DLB-30-150PM 		30mm 150mm
1 week
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 150mm
Edge Thickness te 6.3mm
Center Thickness tc 8.1mm
Back focal length fb 146mm
Centration ＜1′
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Achromatic Doublet 50mm Diameter 249.4mm Focal Length
DLB-50-250PM 		50mm 249.4mm
1 week
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 249.4mm
Edge Thickness te 9.1mm
Center Thickness tc 12.1mm
Back focal length fb 243.4mm
Centration ＜1′
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Achromatic Doublet 100mm Diameter 499.6mm Focal Length
DLB-100-500PM 		100mm 499.6mm
6-12 weeks
£2,802.63
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ100mm
Focal length f 499.6mm
Edge Thickness te 15.2mm
Center Thickness tc 21.1mm
Back focal length fb 488.8mm
Centration ＜1′
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Achromatic Doublet 10mm Diameter 80.1mm Focal Length
DLB-10-80PM 		10mm 80.1mm
1 week
£56.07
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ10mm
Focal length f 80.1mm
Edge Thickness te 4.2mm
Center Thickness tc 4.6mm
Back focal length fb 77.8mm
Centration ＜1′
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Achromatic Doublet 25mm Diameter 69.9mm Focal Length
DLB-25-70PM 		25mm 69.9mm
1 week
£88.57
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 69.9mm
Edge Thickness te 6.3mm
Center Thickness tc 9mm
Back focal length fb 65.3mm
Centration ＜1′
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Achromatic Doublet 30mm Diameter 220.2mm Focal Length
DLB-30-220PM 		30mm 220.2mm
1 week
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 220.2mm
Edge Thickness te 5.9mm
Center Thickness tc 7.1mm
Back focal length fb 216.5mm
Centration ＜1′
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Achromatic Doublet 50mm Diameter 400mm Focal Length
DLB-50-400PM 		50mm 400mm
1 week
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 400mm
Edge Thickness te 8.3mm
Center Thickness tc 10.2mm
Back focal length fb 394.7mm
Centration ＜1′
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Achromatic Doublet 12.7mm Diameter 30mm Focal Length
DLB-12.7-30PM 		12.7mm 30mm
6-12 weeks
£82.75
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ12.7mm
Focal length f 30mm
Edge Thickness te 5.2mm
Center Thickness tc 6.8mm
Back focal length fb 26.7mm
Centration ＜1′
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Achromatic Doublet 25mm Diameter 119.8mm Focal Length
DLB-25-120PM 		25mm 119.8mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 119.8mm
Edge Thickness te 5.6mm
Center Thickness tc 7.2mm
Back focal length fb 116.2mm
Centration ＜1′
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Achromatic Doublet 30mm Diameter 350mm Focal Length
DLB-30-350PM 		30mm 350mm
1 week
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 350mm
Edge Thickness te 5.6mm
Center Thickness tc 6.4mm
Back focal length fb 346.2mm
Centration ＜3′
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Achromatic Doublet 50mm Diameter 599.9mm Focal Length
DLB-50-600PM 		50mm 599.9mm
6-12 weeks
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 599.9mm
Edge Thickness te 8mm
Center Thickness tc 9.2mm
Back focal length fb 594.4mm
Centration ＜3′
i
Achromatic Doublet 12.7mm Diameter 60mm Focal Length
DLB-12.7-60PM 		12.7mm 60mm
6-12 weeks
£68.68
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ12.7mm
Focal length f 60mm
Edge Thickness te 4.6mm
Center Thickness tc 5.4mm
Back focal length fb 57.3mm
Centration ＜1′
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Achromatic Doublet 25mm Diameter 200.1mm Focal Length
DLB-25-200PM 		25mm 200.1mm
6-12 weeks
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 200.1mm
Edge Thickness te 5.2mm
Center Thickness tc 6.1mm
Back focal length fb 197mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 500mm Focal Length
DLB-30-500PM 		30mm 500mm
1 week
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 500mm
Edge Thickness te 5.5mm
Center Thickness tc 6mm
Back focal length fb 496.5mm
Centration ＜3′
i
Achromatic Doublet 50mm Diameter 1000mm Focal Length
DLB-50-1000PM 		50mm 1000mm
6-12 weeks
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 1000mm
Edge Thickness te 7.6mm
Center Thickness tc 8.3mm
Back focal length fb 995mm
Centration ＜3′
i
Achromatic Doublet 12.7mm Diameter 100.1mm Focal Length
DLB-12.7-100PM 		12.7mm 100.1mm
1 week
£64.12
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ12.7mm
Focal length f 100.1mm
Edge Thickness te 4.3mm
Center Thickness tc 4.8mm
Back focal length fb 97.9mm
Centration ＜1′
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Achromatic Doublet 25mm Diameter 300mm Focal Length
DLB-25-300PM 		25mm 300mm
6-12 weeks
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 300mm
Edge Thickness te 5mm
Center Thickness tc 5.6mm
Back focal length fb 296.6mm
Centration ＜3′
i
Achromatic Doublet 40mm Diameter 80.2mm Focal Length
DLB-40-80PM 		40mm 80.2mm
6-12 weeks
£122.32
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 80.2mm
Edge Thickness te 9.7mm
Center Thickness tc 15.8mm
Back focal length fb 71.8mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 150.7mm Focal Length
DLB-50.8-150PM 		50.8mm 150.7mm
1 week
£137.16
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 150.7mm
Edge Thickness te 10.4mm
Center Thickness tc 15.5mm
Back focal length fb 142.8mm
Centration ＜1′
i
Achromatic Doublet 15mm Diameter 40.1mm Focal Length
DLB-15-40PM 		15mm 40.1mm
1 week
£84.20
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ15mm
Focal length f 40.1mm
Edge Thickness te 5.2mm
Center Thickness tc 6.9mm
Back focal length fb 36.5mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 60.1mm Focal Length
DLB-25.4-60PM 		25.4mm 60.1mm
1 week
£90.89
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 60.1mm
Edge Thickness te 6.6mm
Center Thickness tc 9.8mm
Back focal length fb 55.2mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 150.1mm Focal Length
DLB-40-150PM 		40mm 150.1mm
1 week
£110.68
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 150.1mm
Edge Thickness te 7.7mm
Center Thickness tc 10.9mm
Back focal length fb 144.5mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 299.5mm Focal Length
DLB-50.8-300PM 		50.8mm 299.8mm
1 week
£122.03
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 299.5mm
Edge Thickness te 8.6mm
Center Thickness tc 11.2mm
Back focal length fb 293.7mm
Centration ＜1′
i
Achromatic Doublet 15mm Diameter 70.2mm Focal Length
DLB-15-70PM 		15mm 70.2mm
in stock
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ15mm
Focal length f 70.2mm
Edge Thickness te 4.8mm
Center Thickness tc 5.7mm
Back focal length fb 67.4mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 100.2mm Focal Length
DLB-25.4-100PM 		25.4mm 100.2mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 100.2mm
Edge Thickness te 5.8mm
Center Thickness tc 7.7mm
Back focal length fb 96.5mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 220.7mm Focal Length
DLB-40-220PM 		40mm 220.7mm
6-12 weeks
£106.90
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 220.7mm
Edge Thickness te 7mm
Center Thickness tc 9.2mm
Back focal length fb 216mm
Centration ＜1′
i
Achromatic Doublet 50.8mm Diameter 700mm Focal Length
DLB-50.8-700PM 		50.8mm 700mm
6-12 weeks
£122.03
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50.8mm
Focal length f 700mm
Edge Thickness te 7.8mm
Center Thickness tc 8.9mm
Back focal length fb 694.6mm
Centration ＜3′
i
Achromatic Doublet 20mm Diameter 30.6mm Focal Length
DLB-20-30PM 		20mm 30.6mm
6-12 weeks
£88.57
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 30.6mm
Edge Thickness te 6.8mm
Center Thickness tc 10.9mm
Back focal length fb 24.9mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 170.4mm Focal Length
DLB-25.4-170PM 		25.4mm 170.4mm
1 week
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 170.4mm
Edge Thickness te 5.3mm
Center Thickness tc 6.4mm
Back focal length fb 167.1mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 349.9mm Focal Length
DLB-40-350PM 		40mm 349.9mm
6-12 weeks
£106.90
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 349.9mm
Edge Thickness te 6.5mm
Center Thickness tc 7.9mm
Back focal length fb 345.8mm
Centration ＜1′
i
Achromatic Doublet 60mm Diameter 200.3mm Focal Length
DLB-60-200PM 		60mm 200.3mm
6-12 weeks
£1,999.27
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ60mm
Focal length f 200.3mm
Edge Thickness te 10.7mm
Center Thickness tc 16.1mm
Back focal length fb 192.1mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 60.2mm Focal Length
DLB-20-60PM 		20mm 60.2mm
1 week
£88.57
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 60.2mm
Edge Thickness te 5.4mm
Center Thickness tc 7.4mm
Back focal length fb 56.6mm
Centration ＜1′
i
Achromatic Doublet 25.4mm Diameter 250.8mm Focal Length
DLB-25.4-250PM 		25.4mm 250.8mm
6-12 weeks
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25.4mm
Focal length f 250.8mm
Edge Thickness te 5mm
Center Thickness tc 5.8mm
Back focal length fb 247.7mm
Centration ＜1′
i
Achromatic Doublet 40mm Diameter 500mm Focal Length
DLB-40-500PM 		40mm 500mm
6-12 weeks
£106.90
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ40mm
Focal length f 500mm
Edge Thickness te 6.3mm
Center Thickness tc 7.2mm
Back focal length fb 495.6mm
Centration ＜3′
i
Achromatic Doublet 60mm Diameter 597.9mm Focal Length
DLB-60-600PM 		60mm 597.9mm
6-12 weeks
£1,999.27
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ60mm
Focal length f 597.9mm
Edge Thickness te 8.3mm
Center Thickness tc 10.1mm
Back focal length fb 592.6mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 99.5mm Focal Length
DLB-20-100PM 		20mm −99.5mm
6-12 weeks
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 99.5mm
Edge Thickness te 4.9mm
Center Thickness tc 6.1mm
Back focal length fb 96.4mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 60.3mm Focal Length
DLB-30-60PM 		30mm 60.3mm
1 week
£102.63
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 60.3mm
Edge Thickness te 8.1mm
Center Thickness tc 12.6mm
Back focal length fb 53.9mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 120.2mm Focal Length
DLB-50-120PM 		50mm 120.2mm
1 week
£144.73
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 120.2mm
Edge Thickness te 11.4mm
Center Thickness tc 17.7mm
Back focal length fb 111mm
Centration ＜1′
i
Achromatic Doublet 80mm Diameter 299.8mm Focal Length
DLB-80-300PM 		80mm 299.8mm
6-12 weeks
£2,400.95
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ80mm
Focal length f 299.8mm
Edge Thickness te 12.4mm
Center Thickness tc 18.8mm
Back focal length fb 290.2mm
Centration ＜1′
i
Achromatic Doublet 10mm Diameter 30.1mm Focal Length
DLB-10-30PM 		10mm 30.1mm
1 week
£64.61
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ10mm
Focal length f 30.1mm
Edge Thickness te 4.7mm
Center Thickness tc 5.7mm
Back focal length fb 27.4mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 170mm Focal Length
DLB-20-170PM 		20mm 170mm
in stock
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 170mm
Edge Thickness te 4.6mm
Center Thickness tc 5.3mm
Back focal length fb 167.2mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 100.7mm Focal Length
DLB-30-100PM 		30mm 100.7mm
in stock
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 100.7mm
Edge Thickness te 6.8mm
Center Thickness tc 9.5mm
Back focal length fb 96mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 200.1mm Focal Length
DLB-50-200PM 		50mm 200.1mm
1 week
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 200.1mm
Edge Thickness te 9.6mm
Center Thickness tc 13.3mm
Back focal length fb 193.3mm
Centration ＜1′
i
Achromatic Doublet 100mm Diameter 200.6mm Focal Length
DLB-100-200PM 		100mm 200.6mm
6-12 weeks
£2,802.63
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ100mm
Focal length f 200.6mm
Edge Thickness te 21.8mm
Center Thickness tc 37mm
Back focal length fb 181mm
Centration ＜1′
i
Achromatic Doublet 10mm Diameter 60.1mm Focal Length
DLB-10-60PM 		10mm 60.1mm
1 week
£56.07
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ10mm
Focal length f 60.1mm
Edge Thickness te 4.4mm
Center Thickness tc 4.9mm
Back focal length fb 57.6mm
Centration ＜1′
i
Achromatic Doublet 20mm Diameter 250mm Focal Length
DLB-20-250PM 		20mm 250mm
1 week
£68.58
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ20mm
Focal length f 250mm
Edge Thickness te 4.4mm
Center Thickness tc 4.9mm
Back focal length fb 247mm
Centration ＜3′
i
Achromatic Doublet 25mm Diameter 50.1mm Focal Length
DLB-25-50PM 		25mm 50.1mm
1 week
£90.89
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 50.1mm
Edge Thickness te 7.1mm
Center Thickness tc 10.9mm
Back focal length fb 44.9mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 169.9mm Focal Length
DLB-30-170PM 		30mm 169.9mm
1 week
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 169.9mm
Edge Thickness te 6.1mm
Center Thickness tc 7.7mm
Back focal length fb 166mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 299.5mm Focal Length
DLB-50-300PM 		50mm −299.5mm
1 week
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 299.5mm
Edge Thickness te 8.7mm
Center Thickness tc 11.2mm
Back focal length fb 293.7mm
Centration ＜1′
i
Achromatic Doublet 100mm Diameter 799.5mm Focal Length
DLB-100-800PM 		100mm 799.5mm
6-12 weeks
£2,802.63
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ100mm
Focal length f 799.5mm
Edge Thickness te 13.7mm
Center Thickness tc 17.4mm
Back focal length fb 790.4mm
Centration ＜1′
i
Achromatic Doublet 10mm Diameter 100.5mm Focal Length
DLB-10-100PM 		10mm 100.5mm
1 week
£56.07
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ10mm
Focal length f 100.5mm
Edge Thickness te 4.2mm
Center Thickness tc 4.5mm
Back focal length fb 98.1mm
Centration ＜1′
i
Achromatic Doublet 25mm Diameter 80mm Focal Length
DLB-25-80PM 		25mm 80mm
1 week
£88.57
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 80mm
Edge Thickness te 6.2mm
Center Thickness tc 8.5mm
Back focal length fb 75.9mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 249.7mm Focal Length
DLB-30-250PM 		30mm 249.7mm
1 week
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 249.7mm
Edge Thickness te 5.8mm
Center Thickness tc 6.9mm
Back focal length fb 246.1mm
Centration ＜1′
i
Achromatic Doublet 50mm Diameter 451.5mm Focal Length
DLB-50-450PM 		50mm 451.5mm
1 week
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 451.5mm
Edge Thickness te 8.3mm
Center Thickness tc 9.9mm
Back focal length fb 446.2mm
Centration ＜1′
i
Achromatic Doublet 12.7mm Diameter 40.1mm Focal Length
DLB-12.7-40PM 		12.7mm 40.1mm
1 week
£82.75
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ12.7mm
Focal length f 40.1mm
Edge Thickness te 4.9mm
Center Thickness tc 6.1mm
Back focal length fb 36.9mm
Centration ＜1′
i
Achromatic Doublet 25mm Diameter 149.6mm Focal Length
DLB-25-150PM 		25mm 149.6mm
6-12 weeks
£84.10
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f 149.6mm
Edge Thickness te 5.5mm
Center Thickness tc 6.7mm
Back focal length fb 146.2mm
Centration ＜1′
i
Achromatic Doublet 30mm Diameter 400mm Focal Length
DLB-30-400PM 		30mm 400mm
1 week
£91.67
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ30mm
Focal length f 400mm
Edge Thickness te 5.5mm
Center Thickness tc 6.2mm
Back focal length fb 396.3mm
Centration ＜3′
i
Achromatic Doublet 50mm Diameter 700mm Focal Length
DLB-50-700PM 		50mm 700mm
6-12 weeks
£121.93
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Material BK7, SF2
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ50mm
Focal length f 700mm
Edge Thickness te 7.8mm
Center Thickness tc 8.9mm
Back focal length fb 694.6mm
Centration ＜3′
i
Achromatic Doublet 12.7mm Diameter 69.9mm Focal Length
DLB-12.7-70PM 		12.7mm 69.9mm
1 week
£68.68
Material BK7, SF2
Design wavelength Blue: 486.1nm, Green: 546.1nm, Red: 656.3nm
Coating Broadband Multilayer Antireflection Coating for the Visible
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2　
(Laser pulse width 10ns, repetition frequency 20Hz)
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ12.7mm
Focal length f 69.9mm
Edge Thickness te 4.5mm
Center Thickness tc 5.2mm
Back focal length fb 67.5mm
Centration ＜1′

You must be logged in to ask questions

◦The spherical aberration of achromatic doublets is better than singlets and minimized at infinite conjugate ratios.
◦Achromatic Doublets are coated on both surfaces with a broadband multi-layer anti-reflection coating for the visible wavelength (400 − 700nm).
◦Set the positive part to the side of the incident parallel beam and put the negative part to the side of the focal point to minimize spherical aberration.
◦The difference in focal length of a lens at each wave length is Chromatic aberration and is due to “dispersion of the glass”, the change in refractive index of glass according to wavelength. This can be corrected by combining glasses with low and high dispersions. Spherical aberration is when a ray enters a lens farther from its optical axis and has a shorter focus than a paraxial focus.

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