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double concave optical glass lens

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double concave optical glass lens

Product description:

double concave optical glass lens

Double concave lens is the most common form of Negative lens. Negative lens is most suited to producing diverging light or a virtual image, where the input light is converging.

Specifications:


Material:
BK7, Fused Silica, SF10, CaF2, Sapphire .etc.
Paraxial Focal Length Tolerance: ±2%
Dimension Tolerance: ±0.2(General). ±0.05(High Precision)
Centration: <3 arc min
IRR: λ/4@633nm(General),λ/10@633nm(High Precision)
Clear Aperture: >80%(Small Size), >95%(Large Size)
Surface Figure <1.5λ@633nm(General),<λ/4@633nm(High Precision)
Surface Quality: 60/40(General),10/5(High Precision)
Bevel: <0.25mm
Coating: Uncoated, AR,PR, HR, etc.


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