The other option of Germanium window-ZnSe window

With its wide transmission range of 0.6–22μm, low absorption and excellent thermal stability, ZnSe (zinc selenide) windows serve as core window materials for infrared and high-power laser systems. Zinc Selenide are widely used in industrial, medical, security and scientific research applications.

ZnSe windows can be serve as resonator windows, output windows and beam delivery windows. ZnSe is suitable for the 10.6μm. Its low absorption (α<0.0005 cm⁻¹) and high thermal shock resistance ensure stable operation under high-power conditions.

Typical Applications: Laser cutting/welding/marking, surface treatment, medical laser surgery (e.g., tissue ablation).

ZnSe used as optical windows for Forward-Looking Infrared (FLIR), industrial thermal imagers and security night vision devices, it features excellent transmission in the 8–12μm for clear imaging.

Typical Applications: power inspection, building heat loss detection, border security night vision.

Zinc Selenide act as sample cell windows and ATR crystal windows for FTIR spectrometers, it is compatible with the 1–23μm waveband, featuring good chemical stability and resistance to deliquescence.

Typical Applications: Gas composition analysis (NDIR), material structure characterization, environmental monitoring.

ZnSe window employed as for infrared physiotherapy equipment and beam delivery windows for laser surgeries (e.g., dermatology, ophthalmology), it has good biocompatibility and low absorption.

Typical Applications: CO₂ laser freckle removal, tissue coagulation, infrared thermotherapy for joint inflammation.