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Meniscus Lenses

Material:
N-BK7, UV grade fused silica, CaF₂ etc

Surface Flatness:
N<3, △N<λ/4

Coating:
Uncoated,
Single Layer MgF₂,

AR/AR@250-400nm, Ravg<0.5%
AR/AR@400-700nm, Ravg<0.5%
AR/AR@650-1050nm, Ravg<0.5%
AR/AR@1000-1650nm, Ravg<0.5%

Surface Quality:
60/40~10/5


Clear Aperture:

>90%

Convex-concave (meniscus) lenses can be either positive or negative, depending on the relative curvatures of the two surfaces. A negative meniscus lens has a steeper concave surface and is thinner at the centre than at the edge. Conversely, a positive meniscus lens has a steeper convex surface and is thicker at the centre than at the edge.
wdt_ID Attributes Values

Positive Lens

Negative lens

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