BK7 Plano-concave Spherical Lenses

Material:BK7 

Design Wavelength:632.8nm 

Focal Length Tolerance:±1% 

Diameter Tolerance:+0.0/-0.1mm 

Thickness Tolerance:±0.1mm 

Surface Accuracy:λ/4@632.8nm 

Surface Quality:40-20 

Centration:<3' 

Clear Aperture:>90% 

Bevelling:<0.2×45°

Coating:AR 

        A:350-650nm 

        B:650-1050nm 

        C:1050-1580nm