ZnSe Wedged Windows
ZnSe wedged windows reduce etalon fringes and optical feedback in CO2 laser and infrared systems. Request wedge-angle and coating review.
Product Overview
Overview
ZnSe wedged windows are infrared protective windows with a controlled wedge angle. They are used when a standard parallel window would create etalon fringes, unstable feedback, or unwanted reflected-beam interaction in CO2 laser and infrared systems.
Why this material or geometry matters
The wedge prevents the two optical faces from behaving like a parallel cavity. This helps reduce interference effects and lowers the risk of optical feedback reaching sensitive laser components. ZnSe remains a common material choice when the assembly also needs practical transmission across a wide infrared range.
Quick Specifications
| Parameter | Value |
|---|---|
| Material | ZnSe |
| Wavelength Range | 0.6-18 µm |
| Diameter | 5-100 mm |
| Thickness | 2-10 mm |
| Surface Figure | λ/10 @ 633 nm |
| Wedge Angle | 30 arcmin ±10 arcsec |
| Diameter Tolerance | +0.0/-0.1 mm |
| Thickness Tolerance | ±0.2 mm |
| Surface Quality | 40/20 scratch-dig |
| Chamfer | Protective chamfer 0.2-0.5 mm × 45° |
| Coating | Uncoated or custom AR coating on request |
Typical Applications
CO2 laser cavity feedback reduction
Infrared protective windows
Thermal imaging systems
IR diagnostic instruments
Beam delivery assemblies that must suppress fringes
Engineering Notes / Selection Guidance
The source material references both a precision 30 arcmin wedge specification and broader wedge-angle selection scenarios. For quotation, confirm the required beam deviation, coating target, clear aperture, mounting thickness, and whether reflected-beam separation is part of the optical design. If the system is feedback-sensitive, the wedge direction and mechanical clocking should also be defined on the drawing.
Request a Quote / Contact
Send the wavelength, wedge angle requirement, clear aperture, coating target, and drawing through the contact page for engineering review.