VIS Achromatic Doublets

DLB

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.
custom product
Customize product
Name Diameter φD Focal length Delivery Price Add to cart
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
3-5 days
£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
3-5 days
£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 50.3mm Focal Length
DLB-30-50PM
30mm 50.3mm
3-5 days
£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
3-5 days
£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 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′
i
Achromatic Doublet 10mm Diameter 50mm Focal Length
DLB-10-50PM
10mm 50mm
3-5 days
£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′
i
Achromatic Doublet 20mm Diameter 220mm Focal Length
DLB-20-220PM
20mm 220mm
3-5 days
£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′
i
Achromatic Doublet 30mm Diameter 80.3mm Focal Length
DLB-30-80PM
30mm 80.3mm
3-5 days
£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
3-5 days
£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 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′
i
Achromatic Doublet 10mm Diameter 80.1mm Focal Length
DLB-10-80PM
10mm 80.1mm
3-5 days
£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′
i
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′
i
Achromatic Doublet 30mm Diameter 150mm Focal Length
DLB-30-150PM
30mm 150mm
3-5 days
£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′
i
Achromatic Doublet 50mm Diameter 249.4mm Focal Length
DLB-50-250PM
50mm 249.4mm
3-5 days
£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′
i
Achromatic Doublet 12.7mm Diameter 30mm Focal Length
DLB-12.7-30PM
12.7mm 30mm
3-5 days
£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′
i
Achromatic Doublet 25mm Diameter 69.9mm Focal Length
DLB-25-70PM
25mm 69.9mm
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 φ25mm
Focal length f 69.9mm
Edge Thickness te 6.3mm
Center Thickness tc 9mm
Back focal length fb 65.3mm
Centration <1′
i
Achromatic Doublet 30mm Diameter 220.2mm Focal Length
DLB-30-220PM
30mm 220.2mm
3-5 days
£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′
i
Achromatic Doublet 50mm Diameter 400mm Focal Length
DLB-50-400PM
50mm 400mm
3-5 days
£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′
i
Achromatic Doublet 12.7mm Diameter 60mm Focal Length
DLB-12.7-60PM
12.7mm 60mm
in stock
£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′
i
Achromatic Doublet 25mm Diameter 119.8mm Focal Length
DLB-25-120PM
25mm 119.8mm
3-5 days
£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′
i
Achromatic Doublet 30mm Diameter 350mm Focal Length
DLB-30-350PM
30mm 350mm
3-5 days
£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′
i
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 100.1mm Focal Length
DLB-12.7-100PM
12.7mm 100.1mm
3-5 days
£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′
i
Achromatic Doublet 25mm Diameter 200.1mm Focal Length
DLB-25-200PM
25mm 200.1mm
3-5 days
£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
3-5 days
£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 15mm Diameter 40.1mm Focal Length
DLB-15-40PM
15mm 40.1mm
6-12 weeks
£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 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
3-5 days
£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 50.8mm Diameter 299.5mm Focal Length
DLB-50.8-300PM
50.8mm 299.8mm
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 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
3-5 days
£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 60.1mm Focal Length
DLB-25.4-60PM
25.4mm 60.1mm
3-5 days
£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
3-5 days
£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 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