Zinc selenide (ZnSe) meniscus lens

Germanium (Ge) meniscus lens
  • ZnSe lens is widely used in CO2 laser processing industry, including laser cutting, engraving, marking, drilling and other laser systems. The produced zinc selenide focusing mirror is made in China and imported. The lenses produced can withstand high power density, and the surface film layer is firm, easy to fall off, and resistant to wiping. After zinc selenide double-sided plating, it is used in the common working band 10.6 in CO2 laser industry μ The transmittance of M can reach 99%.
  • Zinc selenide has low absorption to infrared wavelength and can transmit visible light. It is the preferred material for making infrared lens, window, output coupling mirror and beam expander.
  • 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 zinc selenide (ZnSe)
Radius of curvature ± 1mm - ± 50000mm ± 1%
Diameter 3mm-200mm ± 0.1mm
Center thickness tolerance ± 0.1mm
Center deviation 3′(we can process to 30 ″with high precision)
Surface accuracy λ/ 4-2λ
Surface quality 60/40
Effective caliber ≥80%
Coating IR AR Coating 8-12μm or according to the custom requirements
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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