Germanium (Ge) meniscus lens

Germanium (Ge) meniscus lens
  • Germanium single crystal has high hardness, good thermal conductivity, insoluble in water, and the transmission band is 2-12 μ m. It is a very common infrared optical material. At present, it is widely used in infrared imaging system and infrared spectrometer system. Germanium single crystals are also used as substrate materials for various infrared filters.
  • 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. Silicon (SI) material and silicon lens are also common infrared optical materials and chemically inert materials. It has high hardness and insoluble in water. It has good light transmission performance in 1-7um band. At the same time, it also has good light transmission performance in 300-300um far-infrared band, which is the characteristic of other optical infrared materials. Silicon single crystals are usually used as substrates for 3-5um medium wave infrared optical windows and optical filters. Because of its good thermal conductivity and low density, it is also a common material for making laser mirrors.
Technical parameters
Items Parameters
Material Germanium (Ge)
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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