Crylight double concave lens from China for beam expanders

Crylight double concave lens from China for beam expanders

material:
bk7
design wavelength:
546.1nm, n=1.518721
diameter tolerance:
+0.0/-0.1mm
paraxial focal length:
±2%
centration:
3arcminutes
surface figure:
l/4@633nm
surface quality:
60/40
clear aperture:
>80%
bevel:
coating:
uncoated
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