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Double Concave Lenses

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. Pictures and drawings ..

Double Concave Lenses

产品说明

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.

Pictures and drawings of Double-Concave Lenses:

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%(Laege 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:	Uncaoted, AR,PR, HR, etc.

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