Zinc Selenide Windows

A ZnSe window is an optical window made of Zinc Selenide (ZnSe), specifically designed for the infrared range (0.5–20 μm), with excellent performance in the mid- to long-wave infrared region (3–12 μm). It features a broad infrared transmission range, low absorption, and high damage threshold, making it suitable for high-power laser applications.

ZnSe IR windows are mainly used in:

• High-power laser systems as output windows for CO₂ lasers (10.6 μm), and optical sealing in laser cutting/welding equipment

• Thermal imaging and infrared sensing, such as military night vision devices, industrial IR cameras, and fire detection systems

• Spectroscopic analysis, including FTIR spectrometers and gas composition detection (e.g., CO₂, CH₄ analysis)

• Medical devices, such as laser treatment systems for dermatology and infrared diagnostic imaging tools

AR-coated ZnSe windows significantly enhance energy transmission in specific wavelength bands by reducing surface reflection, and are typically used in CO₂ laser systems, multispectral imaging, and high-sensitivity detection.

Yes. ZnSe windows can be manufactured in large sizes and customized for high-volume or OEM projects. We offer full support for large-aperture ZnSe optics up to 1000 mm in diameter, used in industrial, medical, and defense applications.

Yes. We provide the following customization options:

• Shape and size: Circular, square, or custom shapes up to 1000 mm diameter

• Coatings: AR, DLC, and laser-specific coatings for 10.6 μm or other IR wavelengths