Zinc Selenide optical material reference for CO2 laser lenses, windows, and infrared components

ZnSe (Standard)

ZnSe (Standard) optical material for CO2 laser lenses, windows, and IR components, with property review for custom windows, lenses, and IR assemblies.

Key Properties

Transmission Range: 0.5 - 20 µm

Refractive Index: 2.4028 at 10.6 μm

Density: 5.27 g/cm3

Knoop Hardness: 105-120 kg/mm2

Request Quote Upload Drawing

About ZnSe (Standard)

Overview

ZnSe (Standard) is an optical material used for CO2 laser lenses, windows, and IR components. Material selection should be based on wavelength range, mechanical limits, coating compatibility, and the final geometry of the optic.

Key Material Properties

Parameter	Guidance
Transmission Range	0.5-20 μm
Refractive Index	2.4028 at 10.6 μm
Density	5.27 g/cm3
Knoop Hardness	105-120 kg/mm2
Young's Modulus	67.2 GPa
Thermal Expansion	7.110^-6/K @273 K; 7.810^-6/K @373 K

Typical Applications

CO2 laser optics
Thermal imaging windows
Infrared lenses
Beam expanders
IR spectroscopy components

Selection Guidance

Confirm grade, wavelength, coating target, and downstream geometry before selecting ZnSe. Treat the values on this page as engineering selection guidance, then confirm final tolerances, coating, and inspection requirements against the production drawing.

Request Material Review

Use the contact form or email [email protected] with wavelength, size, quantity, coating target, and application notes for a practical material review.