Zinc Selenide Window

• High-purity optical-grade Zinc Selenide
• Excellent infrared transmission
• High transmission from visible to infrared wavelengths
• Low optical absorption
• High laser damage threshold
• Excellent thermal stability
• Superior optical clarity
• Low scatter and optical distortion
• Precision polished optical surfaces
• Excellent machinability for custom optics
• Available with anti-reflective (AR) coatings
• Suitable for high-power CO₂ laser systems
• Custom diameters and thicknesses available
• ISO-quality optical manufacturing
• Certificate of Analysis (COA) included

Property	Specification
Product Name	Zinc Selenide Window
Material	Zinc Selenide (ZnSe)
Chemical Formula	ZnSe
CAS Number	1315-09-9
Purity	99.99% (4N), 99.999% (5N) Available
Crystal Structure	Cubic (Zinc Blende)
Density	Approximately 5.27 g/cm³
Refractive Index	Approximately 2.40 @ 10.6 µm
Transmission Range	Approximately 0.6–20 µm
Surface Quality	40-20 Scratch-Dig or Better
Surface Flatness	λ/10 Available
Parallelism	Custom Specifications Available
Diameter	Standard and Custom Sizes
Thickness	Standard and Custom Thicknesses
Surface Coatings	Uncoated, AR Coated, Custom Optical Coatings
Packaging	Protective Optical Packaging

• Optical Grade ZnSe Windows
• Laser Grade ZnSe Windows
• CO₂ Laser Windows
• Infrared (IR) ZnSe Windows
• Uncoated ZnSe Windows
• Anti-Reflective (AR) Coated ZnSe Windows
• High Power Laser Windows
• Precision Polished ZnSe Windows
• Research Grade ZnSe Windows
• Custom Zinc Selenide Optical Windows

1. What is a Zinc Selenide Window?

A Zinc Selenide (ZnSe) Window is a precision optical component that transmits infrared and visible light while protecting sensitive optical systems. It is commonly used in CO₂ lasers, thermal imaging cameras, infrared spectroscopy, and industrial laser equipment.

2. What wavelength range does ZnSe transmit?

Zinc Selenide provides excellent optical transmission from approximately 0.6 µm to 20 µm, making it suitable for visible, near-infrared, mid-infrared, and long-wave infrared applications.

3. Why is Zinc Selenide commonly used for CO₂ lasers?

ZnSe has high transmission at the 10.6 µm wavelength, low absorption, and a high laser damage threshold, making it one of the preferred optical materials for high-power CO₂ laser cutting, welding, engraving, and marking systems.

4. Are anti-reflective coatings available?

Yes. REG Metals offers:

• Uncoated Windows
• Single-Side AR Coatings
• Double-Side AR Coatings
• Custom Optical Coatings for specific wavelength ranges

5. What industries use Zinc Selenide Windows?

Common industries include:

• Laser Manufacturing
• Semiconductor Manufacturing
• Aerospace
• Defense
• Thermal Imaging
• Medical Devices
• Spectroscopy
• Optical Instrumentation
• Research Laboratories
• Universities
• Government Laboratories

6. Can REG Metals manufacture custom optical windows?

Yes. We offer custom diameters, thicknesses, edge profiles, bevels, optical polishing, precision tolerances, and specialty coatings to meet customer specifications.