Plano concave Spherical Lenses - Lenses - BTMT | Beijing Trans Manufacture and Trade Co., Ltd.

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Plano concave Spherical Lenses

Plano concave lenses are manufactured with one concave surface and one plane surface. They have negative focal lengths. These lenses are often used to expand light or to increase focal lengths in existing systems.

Specifications

Material
Crown, Flint, UVFS
Focal Length Tolerance
± 0.5%
Diameter Tolerance
+0/-0.2mm
Thickness Tolerance
± 0.2mm
Surface Flatness
λ/10
Centration Error
<3 arcmin
Surface Quality
20/10
Clear Aperture
>90% of central diameter
Coating
According to the requirements

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