Meniscus Lenses
◢Meniscus Lenses
One side of meniscus lens is convex, another side is concave. It can be a convergent lens or a divergent lens, which is decided together by refractive index, curvature and radius.
Positively meniscus lens are designed to minimize spherical aberration and can be used alone to obtain a minimum converging spot or, when used in combination with another lens, to reduce the focal length and thus increase the numerical aperture. When used to converge parallel light, the convex side of the lens should be oriented toward the light source to minimize spherical aberration.
Negative meniscus lens have a thinner center section than the edges, which causes light to diverge and are designed to minimize spherical aberration. They are often used in conjunction with other lenses to increase the focal length and thus reduce the numerical aperture (NA) of the optical system. When used to diverge light, the concave side should be directed toward the beam to minimize spherical aberration.
◢CLZ Manufacturing Ranges
Materials: Over 120 visible materials, Fused Silica
Sizes: 15mm to 150mm
Surface Accuracy: 1/10λ
Surface Quality: 80/50 to 10/5
Radii: 5mm to Plano, +/-.1% tolerances or better
