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  • Meniscus Lenses
  • Meniscus Lenses

Meniscus Lenses

  • Broad diameter range: 1.0mm to 300mm
  • Substrate materials: Fused Silica, BK7, optical glass, BaF2, CaF2, MgF2 and ZnSe etc.
  • Coating options: uncoated, MgF2 single layer, V-type and broad band AR coating
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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 Lens has one concave and one convex surface. Convex-concave lens which is thicker at the center than at the edge, defined as positive meniscus lens, is usually used to decrease the focal length and increase the NA of system; while convex-concave lens which is thinner at the center than at the edge, defined as negative meniscus lens, is often used to increase the focal length and decrease the NA of system. Meniscus lens is a useful element to minimize the spherical aberration.

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

Positive Meniscus Lenses:

Negative Meniscus Lenses: