plano concave spherical lens
Diameter:2mm to 500mm
Diameter Tolerance:+0.00/-0.1 or customer size
Material:N-BK7,H-K9L,Sapphire,Fused Silica(JGS1),Caf2,ZnSe,Si,Ge,etc.
Surface Quality:80-50 to 10/5
Flatness:1 lambda to 1/10 lambda
Thickness Tolerance:+0.00/-0.05mm
Focal Length Tolerance:+/-1%
Clear Aperture:>90% of diameter
Centration:<3arcmin
Coating:Single Mag2, Multiple Layers AR coating
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