Double concave lens

20 Dec 2011

Diameter Available 3mm--50mm
Diameter Tolerance +0/-0.5mm
Thickness Tolerance +/-0.05mm
Focal Length Tolerance ±1%
Surface Accuracy L/4 irregularity @632.8nm
Surface Quality 40-20 S/D
Centration ＜3 arc min
Clear Aperture ＞90%
Bevel Protective bevel
Material BK7,Fused silica,Quartz,SF11, and other optical glass
Coating AR coating