ZnSe Linsen

ZnSe Lenses

Marking / Cutting / Engraving

The ZnSe lenses for laser cutting and marking are made of high quality material with lowest absorption values. In combination with an anti-reflection coating, PLEIGER optics enable the focusing of a high-power CO2 laser with excellent precision. For highest laser powers above 4 kW we offer a low absorbing AR/AR coating that minimizes thermal lensing.

Pleiger optics made of silicon, germanium, ZnSe and ZnS are used in thermography, IR spectroscopy, night vision devices and target tracking. Our product range includes windows, spherical and aspherical lenses and windows for broadband applications from NIR to FIR.

We manufacture our ZnSe optics according to customer specifications. Typical products are meniscus lenses, plano covex lenses and Brewster windows. We supply, if requested, including an AR/AR coating for one laser wavelength or for a broadband application.

ZnSe Linse und ZnSe Optik

Lenses and windows

  • Standard AR/AR coating (A<0,2%)
  • Low absorption AR/AR coating (A<0,15%)
  • Lenses: menicus, plano-concave, convex-convex
  • Windows: protective windows and Brewster windows


  • Transmission range: 0,5 – 22 µm
  • Refractive index @ 10,6 µm 2,4028
  • Refrective index Inhomogeneity @ 10,6 µm 3 x 10-6
  • Temperature change of refractive index @ 10,6 µm 611 x 10-6 K-1

With ZnSe one typically distinguishes between two qualities. For high-power applications and systems such as laser cutting and laser marking, only the lowest absorption ZnSe grade is used. Only this quality hardly heats up during use and enables constant cutting and marking results.

Absorption is not decisive for thermography. Here ZnSe material can be used which is cheaper than the laser quality.

ZnSe can develop toxic substances if used improperly. Do not process ZnSe mechanically, do not generate dust and do not let it come into contact with strong acids. Observe the local regulations for disposal or contact us.

Our AR/AR coatings are thorium-free. We only use coating materials such as fluorides, sulfides or semiconductors.

Do you need further information on IR optics?

Please contact us.

+49 2324 398406

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