lens

Customizable Optical ZnSe Glass Lens

  • Material: Znse
  • Surface Quality: 40-20
  • Thickness Tolerance: +/- 0.25mm
  • Chamfer: 0.35mm at 45° (typical)
  • Focal Length Tolerance: +/- 2%
  • Clear Aperture: Exceeds central 85% of dimension
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What is a ZnSe lens?

Zinc Selenide Lens (ZnSe Lens) is an optical lens made of the compound zinc selenide.

It is widely used in the mid-infrared band, especially in 10.6μm CO₂ laser systems, where it has an extremely high utilization rate.

Because of its excellent infrared transmittance and low absorption rate, ZnSe lenses have become the ideal choice for laser systems.

Some commonly used technologies such as laser cutting and infrared thermal imaging systems all need zinc selenide lenses.

ZnSe is a yellow semi-transparent polycrystalline or single-crystalline material. It is widely used in infrared optical systems.

ZnSe has excellent infrared transmission properties.

The production of the ZnSe lens

We offer various types of zinc selenide lenses.

The spherical, cylindrical and crescent-shaped lenses are available in multiple diameters, thicknesses, focal lengths and configurations. You can also choose aspheric, plano-concave, concave-convex and plano-convex lenses.

Chenyu employs the most advanced technological processes to offer you top-quality services. Welcome to inquire.

 

Optical characteristics of the lens

 

  • Wide transmission range:

0.5μm to 22μm, covering visible light to far-infrared

  • High transmittance:

Particularly outstanding in the 10.6μm (CO₂ laser wavelength) range

  • Low absorption, resistant to high power:

Suitable for continuous high-power laser working environments

  • Excellent thermal stability:

Capable of withstanding medium-high temperature working conditions

  • Moderate refractive index:

Approximately 2.4, conducive to optical design

 

The applications of the ZnSe lens

Because of its own characteristics, the ZnSe lens has a lot of applications in the laser systems. Here are the following applications of it:

  • CO₂ Laser Cutting, Welding and Marking System
  • Infrared thermal imaging system and infrared camera
  • Infrared Spectroscopy Analysis (FTIR)
  • Aerospace and Defense Infrared Detection
  • Medical infrared scanning instrument
  • Industrial online temperature measurement equipment

 

Will the ZnSe lens oxidize or change color?
A: ZnSe is relatively stable on its own, but it is recommended to avoid high humidity and high temperature environments. Coating (such as DLC) can enhance its durability.
Is it applicable to continuous laser systems?
A: Yes. ZnSe has a low absorption rate and is highly suitable for continuous laser systems (such as CO₂ laser).

Can non-standard sizes or coatings be customized?
A: Yes, Chenyu Optics supports customizing lens sizes, focal lengths, apertures, coating schemes, etc.

 

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