K9 meniscus lens

Germanium (Ge) meniscus lens
  • The combination of meniscus lens and other lenses can lengthen or shorten the focal length of the original lens without increasing spherical aberration or coma in the system.
  • Meniscus lens is divided into positive meniscus lens and negative meniscus lens.
  • Positive meniscus (convex) lens is designed to reduce spherical aberration. When combined with another lens, the positive meniscus lens can reduce the focal length, so as to increase the numerical aperture (NA) of the system without introducing obvious spherical aberration. When used to converge parallel light, the convex surface of the lens shall face the light source to reduce the spherical aberration.
  • Negative meniscus (convex) lens is designed to reduce spherical aberration in optical system. When combined with another lens, the negative meniscus lens can increase the focal length and reduce the numerical aperture (NA) of the system. When used to converge parallel light, the convex surface of the lens shall face the light source to reduce the spherical aberration.
Technical parameters
Items Parameters
Material optical glass, H-K9L (N-BK7)
Radius of curvature ± 1mm - ± 50000mm ± 1%
Diameter 3mm-300mm ± 0.1mm
Center thickness tolerance ± 0.05mm (we can process to ± 0.01mm with high precision)
Center deviation 3′(we can process to 30 ″with high precision)
Surface accuracy λ/ 8 (high precision, we can process to 1 / 10λ)
Surface quality 40/20 (we can process to 10-5 with high precision)
Effective caliber ≥90%
Coating multilayer antireflective film A:350-650nm B:650-1050nm C:1050-1580nm
spectral curve

In addition, we have thousands of stock of K9 plano convex lens, biconvex lens, plano concave lens, biconvex lens, meniscus lens and so on. The price is preferential and the quality is excellent, which can meet your demand for a small order. 

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