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  • Meniscus Lenses
  • Meniscus Lenses

Meniscus Lenses

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Specifications:

Type Positive/Negative meniscus Lens Material BK7, UV FS, CaF2, BaF2, ZnSe ect.
Diameter Range 1mm -300mm Diameter Tolerance +0.0/-0.1mm
Clear Aperture >90% Thickness Tolerance ±0.1mm
Focal Length Tolerance ±2% Surface Quality 40/20 S/D
Irregularity λ/4 @ 633 nm (λ/8 optional) Centering 2 arc min

Meniscus Lenses have one concave and one convex surface. Convex-concave lens is thicker at the center than at the edge, which is positive meniscus lens, usually used to decrease the focal length and increase the NA of system. While, convex-concave lens is thinner at the center than at the edge, which is negative meniscus lens, often used to increase the focal length and decrease the NA of system. The meniscus lens is a useful element to minimize the spherical aberration.

Hangzhou Shalom EO provide the custom meniscus lenses upon customer’s request.

Positive Meniscus Lenses:

Negative Meniscus Lenses: