BK7, BiConcave Lenses (AR 400 - 1600nm)

SLB-B-N-BB

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SKU

SLB-B-N-BB

This is a BK7 lens with a multi-layer anti-reflection coating for the visible to near-infrared range (400-1600 nm).

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SLB-25.4B-50NBB

25.4mm

−49.7mm

BK7

4-6 weeks

95,70 €

Lens Type	Biconcave Lens
Design wavelength	546.1 nm
Refractive index	ne=1.519
Coating	Broadband Multilayer antireflection coating ( 400 - 1600 nm )
Wavelength range of Antireflection Coating	400～1600 nm
Transmittance	> Average 96.5%
Clear aperture	85% of the diameter
Surface Quality (Scratch-Dig)	20−10
Edge thickness te	5.2 mm
Center thickness tc	2 mm
Back focal length fb	-50.4 mm
Radius of curvature r	51.9 mm
Centration	＜1′
Laser Damage Threshold	3 J/cm² ( Laser pulse width ; 10ns , Repetition frequency ; 20Hz )

details

SLB-30B-100NBB

30mm

−99.7mm

BK7

4-6 weeks

82,96 €

Lens Type	Biconcave Lens
Design wavelength	546.1 nm
Refractive index	ne=1.519
Coating	Broadband Multilayer antireflection coating ( 400 - 1600 nm )
Wavelength range of Antireflection Coating	400～1600 nm
Transmittance	> Average 96.5%
Clear aperture	85% of the diameter
Surface Quality (Scratch-Dig)	20−10
Edge thickness te	4.2 mm
Center thickness tc	2 mm
Back focal length fb	-100.3 mm
Radius of curvature r	103.8 mm
Centration	＜1′
Laser Damage Threshold	3 J/cm² ( Laser pulse width ; 10ns , Repetition frequency ; 20Hz )

details

SLB-12.7B-25NBB

12.7mm

−24.7mm

BK7

4-6 weeks

76,82 €

Lens Type	Biconcave Lens
Design wavelength	546.1 nm
Refractive index	ne=1.519
Coating	Broadband Multilayer antireflection coating ( 400 - 1600 nm )
Wavelength range of Antireflection Coating	400～1600 nm
Transmittance	> Average 96.5%
Clear aperture	85% of the diameter
Surface Quality (Scratch-Dig)	20−10
Edge thickness te	3.6 mm
Center thickness tc	2 mm
Back focal length fb	-25.3 mm
Radius of curvature r	25.95 mm
Centration	＜1′
Laser Damage Threshold	3 J/cm² ( Laser pulse width ; 10ns , Repetition frequency ; 20Hz )

details

SLB-30B-50NBB

30mm

−49.7mm

BK7

4-6 weeks

100,41 €

Lens Type	Biconcave Lens
Design wavelength	546.1 nm
Refractive index	ne=1.519
Coating	Broadband Multilayer antireflection coating ( 400 - 1600 nm )
Wavelength range of Antireflection Coating	400～1600 nm
Transmittance	> Average 96.5%
Clear aperture	85% of the diameter
Surface Quality (Scratch-Dig)	20−10
Edge thickness te	6.4 mm
Center thickness tc	2 mm
Back focal length fb	-50.3 mm
Radius of curvature r	51.9 mm
Centration	＜1′
Laser Damage Threshold	3 J/cm² ( Laser pulse width ; 10ns , Repetition frequency ; 20Hz )

details

SLB-25.4B-100NBB

25.4mm

−99.7mm

BK7

4-6 weeks

83,91 €

Lens Type	Biconcave Lens
Design wavelength	546.1 nm
Refractive index	ne=1.519
Coating	Broadband Multilayer antireflection coating ( 400 - 1600 nm )
Wavelength range of Antireflection Coating	400～1600 nm
Transmittance	> Average 96.5%
Clear aperture	85% of the diameter
Surface Quality (Scratch-Dig)	20−10
Edge thickness te	3.6 mm
Center thickness tc	2 mm
Back focal length fb	-100.4 mm
Radius of curvature r	103.8 mm
Centration	＜1′
Laser Damage Threshold	3 J/cm² ( Laser pulse width ; 10ns , Repetition frequency ; 20Hz )

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