* Lens Material: BK7 * Transmissive NIR coating ; * Cylindrial lens; * Spectrophotometer use;

Specifications

Material:	N-BK7
Diameter tolerance:	+/-0.1mm
Design wavelength:	546.1nm
Focal tolerance:	+/-2%
surface quality :	60-40 S/D
Centration:	3 arcmin
Surtace flatness:	λ/4 @633nm
Clear aperture:	90%
Bevel:	Protective bevel

Cylindrical optical concave lens 50.8X50.8mm

BK7 Optical lens