Nonlinear LBO Crystal

Achromatic Negative-Meniscus Lenses

Negative meniscus lens is a convex-concave lens and is with thinner at the center than at the edges.

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The focal length of a meniscus lens may be positive or negative.Meniscus lenses are used to correct phase differences and are often used as corrective lenses. They can also be used as converters for lighting systems, and can be used to eliminate color differences by choosing the right thickness.


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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