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Spherical Lens BK7 BiConcave Uncoated

SLB-B-N

Spherical Lens BK7 BiConcave Uncoated
In stock
SKU
SLB-B-N

Starting at $34.17

These biconcave lenses are used when a very high negative power is required. They can be used in a multi-element system or alone to produce a diverging cone of virtual image.
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Name Diameter φD Focal length Delivery Price Add to cart
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Biconcave Lens 15mm Diameter −49.7mm Focal Length Uncoated
SLB-15B-50N 		15mm −49.7mm
in stock
$40.80
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ15mm
Focal length f −49.7mm
Edge thickness te 3.1mm
Center thickness tc 2mm
Back focal length fb −50.3mm
Radius of curvature r 51.9mm
Centration ＜1′
i
Biconcave Lens 40mm Diameter −99.7mm Focal Length Uncoated
SLB-40B-100N 		40mm −99.7mm
2 weeks
$73.95
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ40mm
Focal length f −99.7mm
Edge thickness te 5.9mm
Center thickness tc 2mm
Back focal length fb −100.3mm
Radius of curvature r 103.8mm
Centration ＜1′
i
Biconcave Lens 20mm Diameter −29.7mm Focal Length Uncoated
SLB-20B-30N 		20mm −29.7mm
in stock
$44.88
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ20mm
Focal length f −29.7mm
Edge thickness te 5.3mm
Center thickness tc 2mm
Back focal length fb −30.3mm
Radius of curvature r 31.14mm
Centration ＜1′
i
Biconcave Lens 50mm Diameter −69.5mm Focal Length Uncoated
SLB-50B-70N 		50mm −69.5mm
2 weeks
$86.70
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ50mm
Focal length f −69.5mm
Edge thickness te 11.9mm
Center thickness tc 3mm
Back focal length fb −70.5mm
Radius of curvature r 72.66mm
Centration ＜1′
i
Biconcave Lens 25mm Diameter −24.7mm Focal Length Uncoated
SLB-25B-25N 		25mm −24.7mm
2 weeks
$64.26
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25mm
Focal length f −24.7mm
Edge thickness te 8.4mm
Center thickness tc 2mm
Back focal length fb −25.3mm
Radius of curvature r 25.95mm
Centration ＜1′
i
Biconcave Lens 50.8mm Diameter −59.5mm Focal Length Uncoated
SLB-50.8B-60N 		50.8mm −59.5mm
in stock
$92.31
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ50.8mm
Focal length f −59.5mm
Edge thickness te 13.8mm
Center thickness tc 3mm
Back focal length fb −60.5mm
Radius of curvature r 62.28mm
Centration ＜1′
i
Biconcave Lens 25mm Diameter −39.7mm Focal Length Uncoated
SLB-25B-40N 		25mm −39.7mm
2 weeks
$59.16
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25mm
Focal length f −39.7mm
Edge thickness te 5.9mm
Center thickness tc 2mm
Back focal length fb −40.3mm
Radius of curvature r 41.52mm
Centration ＜1′
i
Biconcave Lens 50.8mm Diameter −199.5mm Focal Length Uncoated
SLB-50.8B-200N 		50.8mm −199.5mm
6-12 weeks
$79.56
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ50.8mm
Focal length f −199.5mm
Edge thickness te 6.1mm
Center thickness tc 3mm
Back focal length fb −200.5mm
Radius of curvature r 207.6mm
Centration ＜1′
i
Biconcave Lens 25mm Diameter −69.7mm Focal Length Uncoated
SLB-25B-70N 		25mm −69.7mm
2 weeks
$52.53
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25mm
Focal length f −69.7mm
Edge thickness te 4.2mm
Center thickness tc 2mm
Back focal length fb −70.3mm
Radius of curvature r 72.66mm
Centration ＜1′
i
Biconcave Lens 25.4mm Diameter −24.7mm Focal Length Uncoated
SLB-25.4B-25N 		25.4mm −24.7mm
in stock
$64.26
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25.4mm
Focal length f −24.7mm
Edge thickness te 8.6mm
Center thickness tc 2mm
Back focal length fb −25.4mm
Radius of curvature r 25.95mm
Centration ＜1′
i
Biconcave Lens 10mm Diameter −19.7mm Focal Length Uncoated
SLB-10B-20N 		10mm −19.7mm
2 weeks
$37.23
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ10mm
Focal length f −19.7mm
Edge thickness te 3.2mm
Center thickness tc 2mm
Back focal length fb −20.3mm
Radius of curvature r 20.76mm
Centration ＜1′
i
Biconcave Lens 25.4mm Diameter −49.7mm Focal Length Uncoated
SLB-25.4B-50N 		25.4mm −49.7mm
in stock
$57.63
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25.4mm
Focal length f −49.7mm
Edge thickness te 5.2mm
Center thickness tc 2mm
Back focal length fb −50.4mm
Radius of curvature r 51.9mm
Centration ＜1′
i
Biconcave Lens 10mm Diameter −39.7mm Focal Length Uncoated
SLB-10B-40N 		10mm −39.7mm
2 weeks
$35.19
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ10mm
Focal length f −39.7mm
Edge thickness te 2.6mm
Center thickness tc 2mm
Back focal length fb −40.3mm
Radius of curvature r 41.52mm
Centration ＜1′
i
Biconcave Lens 25.4mm Diameter −79.7mm Focal Length Uncoated
SLB-25.4B-80N 		25.4mm −79.7mm
2 weeks
$49.47
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25.4mm
Focal length f −79.7mm
Edge thickness te 4mm
Center thickness tc 2mm
Back focal length fb −80.4mm
Radius of curvature r 83.04mm
Centration ＜1′
i
Biconcave Lens 12.7mm Diameter −14.7mm Focal Length Uncoated
SLB-12.7B-15N 		12.7mm −14.7mm
in stock
$38.25
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ12.7mm
Focal length f −14.7mm
Edge thickness te 4.7mm
Center thickness tc 2mm
Back focal length fb −15.3mm
Radius of curvature r 15.57mm
Centration ＜1′
i
Biconcave Lens 25.4mm Diameter −199.7mm Focal Length Uncoated
SLB-25.4B-200N 		25.4mm −199.7mm
in stock
$44.88
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25.4mm
Focal length f −199.7mm
Edge thickness te 2.8mm
Center thickness tc 2mm
Back focal length fb −200.4mm
Radius of curvature r 207.6mm
Centration ＜1′
i
Biconcave Lens 15mm Diameter −14.7mm Focal Length Uncoated
SLB-15B-15N 		15mm −14.7mm
6-12 weeks
$44.88
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ15mm
Focal length f −14.7mm
Edge thickness te 5.9mm
Center thickness tc 2mm
Back focal length fb −15.3mm
Radius of curvature r 15.57mm
Centration ＜1′
i
Biconcave Lens 30mm Diameter −39.7mm Focal Length Uncoated
SLB-30B-40N 		30mm −39.7mm
2 weeks
$63.24
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ30mm
Focal length f −39.7mm
Edge thickness te 7.6mm
Center thickness tc 2mm
Back focal length fb −40.3mm
Radius of curvature r 41.52mm
Centration ＜1′
i
Biconcave Lens 15mm Diameter −29.7mm Focal Length Uncoated
SLB-15B-30N 		15mm −29.7mm
2 weeks
$41.82
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ15mm
Focal length f −29.7mm
Edge thickness te 3.8mm
Center thickness tc 2mm
Back focal length fb −30.3mm
Radius of curvature r 31.14mm
Centration ＜1′
i
Biconcave Lens 40mm Diameter −39.7mm Focal Length Uncoated
SLB-40B-40N 		40mm −39.7mm
in stock
$91.29
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ40mm
Focal length f −39.7mm
Edge thickness te 12.3mm
Center thickness tc 2mm
Back focal length fb −40.3mm
Radius of curvature r 41.52mm
Centration ＜1′
i
Biconcave Lens 20mm Diameter −19.7mm Focal Length Uncoated
SLB-20B-20N 		20mm −19.7mm
2 weeks
$45.90
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ20mm
Focal length f −19.7mm
Edge thickness te 7.1mm
Center thickness tc 2mm
Back focal length fb −20.3mm
Radius of curvature r 20.76mm
Centration ＜1′
i
Biconcave Lens 50mm Diameter −49.5mm Focal Length Uncoated
SLB-50B-50N 		50mm −49.5mm
2 weeks
$96.90
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ50mm
Focal length f −49.5mm
Edge thickness te 15.8mm
Center thickness tc 3mm
Back focal length fb −50.5mm
Radius of curvature r 51.9mm
Centration ＜1′
i
Biconcave Lens 20mm Diameter −39.7mm Focal Length Uncoated
SLB-20B-40N 		20mm −39.7mm
in stock
$44.88
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ20mm
Focal length f −39.7mm
Edge thickness te 4.4mm
Center thickness tc 2mm
Back focal length fb −40.3mm
Radius of curvature r 41.52mm
Centration ＜1′
i
Biconcave Lens 50mm Diameter −99.5mm Focal Length Uncoated
SLB-50B-100N 		50mm −99.5mm
in stock
$79.56
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ50mm
Focal length f −99.5mm
Edge thickness te 9.1mm
Center thickness tc 3mm
Back focal length fb −100.5mm
Radius of curvature r 103.8mm
Centration ＜1′
i
Biconcave Lens 25mm Diameter −29.7mm Focal Length Uncoated
SLB-25B-30N 		25mm −29.7mm
2 weeks
$63.24
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25mm
Focal length f −29.7mm
Edge thickness te 7.2mm
Center thickness tc 2mm
Back focal length fb −30.3mm
Radius of curvature r 31.14mm
Centration ＜1′
i
Biconcave Lens 50.8mm Diameter −99.5mm Focal Length Uncoated
SLB-50.8B-100N 		50.8mm −99.5mm
in stock
$79.56
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ50.8mm
Focal length f −99.5mm
Edge thickness te 9.3mm
Center thickness tc 3mm
Back focal length fb −100.5mm
Radius of curvature r 103.8mm
Centration ＜1′
i
Biconcave Lens 25mm Diameter −49.7mm Focal Length Uncoated
SLB-25B-50N 		25mm −49.7mm
in stock
$57.63
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25mm
Focal length f −49.7mm
Edge thickness te 5.1mm
Center thickness tc 2mm
Back focal length fb −50.3mm
Radius of curvature r 51.9mm
Centration ＜1′
i
Biconcave Lens 50.8mm Diameter −249.5mm Focal Length Uncoated
SLB-50.8B-250N 		50.8mm −249.5mm
in stock
$79.56
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ50.8mm
Focal length f −249.5mm
Edge thickness te 5.5mm
Center thickness tc 3mm
Back focal length fb −250.5mm
Radius of curvature r 259.5mm
Centration ＜1′
i
Biconcave Lens 25mm Diameter −79.7mm Focal Length Uncoated
SLB-25B-80N 		25mm −79.7mm
in stock
$49.47
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25mm
Focal length f −79.7mm
Edge thickness te 4mm
Center thickness tc 2mm
Back focal length fb −80.3mm
Radius of curvature r 83.04mm
Centration ＜1′
i
Biconcave Lens 10mm Diameter −9.7mm Focal Length Uncoated
SLB-10B-10N 		10mm −9.7mm
in stock
$39.78
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ10mm
Focal length f −9.7mm
Edge thickness te 4.6mm
Center thickness tc 2mm
Back focal length fb −10.3mm
Radius of curvature r 10.38mm
Centration ＜1′
i
Biconcave Lens 25.4mm Diameter −29.7mm Focal Length Uncoated
SLB-25.4B-30N 		25.4mm −29.7mm
in stock
$63.24
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25.4mm
Focal length f −29.7mm
Edge thickness te 7.4mm
Center thickness tc 2mm
Back focal length fb −30.4mm
Radius of curvature r 31.14mm
Centration ＜1′
i
Biconcave Lens 10mm Diameter −24.7mm Focal Length Uncoated
SLB-10B-25N 		10mm −24.7mm
in stock
$37.23
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ10mm
Focal length f −24.7mm
Edge thickness te 3mm
Center thickness tc 2mm
Back focal length fb −25.3mm
Radius of curvature r 25.95mm
Centration ＜1′
i
Biconcave Lens 25.4mm Diameter −59.7mm Focal Length Uncoated
SLB-25.4B-60N 		25.4mm −59.7mm
2 weeks
$54.57
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ25.4mm
Focal length f −59.7mm
Edge thickness te 4.6mm
Center thickness tc 2mm
Back focal length fb −60.4mm
Radius of curvature r 62.28mm
Centration ＜1′
i
Biconcave Lens 10mm Diameter −49.7mm Focal Length Uncoated
SLB-10B-50N 		10mm −49.7mm
2 weeks
$34.17
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating Uncoated
Diameter φD φ10mm
Focal length f −49.7mm
Edge thickness te 2.5mm
Center thickness tc 2mm
Back focal length fb −50.3mm
Radius of curvature r 51.9mm
Centration ＜1′
i
Biconcave Lens 25.4mm Diameter −99.7mm Focal Length Uncoated
SLB-25.4B-100N 		25.4mm −99.7mm
in stock