Aspheric Lens

Meniscus Lens

Meniscus Lenses are convex and concave lenses. If the Convex curvature is bigger than concave , the lens will be positive meniscus lens.  If the concave curvature is bigger than the convex.

Positive Meniscus Lenses may be used to increase the numerical aperture of a positive lens assembly, without an undue increase in the aberrations. Negetive Meniscus Lenses are the best lens form where one conjugates is relatively far from the lens or where both conjugates are the same size of the lens.

Meniscus lenses are used to reduce spherical aberration to a large extent.Smaller focal points and fewer aberrations can be obtained than plano-convex lenses.

Parameter of Meniscus Lens

Material:BK7 Fused Silica CaF2 MgF2 Sapphire Germanium Silicon ZnSe ZnS.

Diameter:0.5-600mm

Dia Tolerance:+/-0.02mm

Thickness Tolerance:+/-0.01mm

Centeration<30 arcmin

Flatness<1/20 lambda

Surface Quality:10-5

Coating: AR BBAR HR.