Zinc selenide plano convex lens

plano convex lens
  • Zinc selenide lens is usually used in high-power CO2 laser system because zinc selenide (ZnSe) has low absorption coefficient and high thermal expansion coefficient.
  • However, since zinc selenide (ZnSe) is relatively soft (Knoop hardness is 120) and easy to scratch, it is not recommended to be used in harsh environment. Pay attention to uniform force when holding and cleaning, so that you can wear finger covers or gloves.

  • With positive focal length, Plano convex lens is often used in imaging or beam collimation. Coated lens is also widely used in visible light and near-infrared applications.
Technical parameters
Items Parameters
Material zinc selenide (ZnSe)
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 IR AR Coating 8-12μm or according to customer requirements
spectral curve

In addition, we have some zinc selenide (ZnSe) plano convex lenses in stock, with preferential prices and excellent quality, which can meet your demand for a small order.

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