Zinc selenide (ZnSe) materials exhibit excellent light transmittance across a broad wavelength range (0.5μm to 22μm). They are commonly used as substrate materials for mirrors and beam splitters in high-power CO₂ laser systems. Additionally, their superior refractive index uniformity and consistency make them ideal for applications such as windows and lenses in thermal imaging systems, medical devices, industrial thermal radiation meters, and infrared spectrometers.
Item No :
ZnSe WindowsProduct Origin :
FuZhouProperties:
| Crystal Structure | Cubic/Polycrystalline |
| Crystallite Size (Diameter) | <100μm |
| Density (g/cm³) | 5.27 |
| Resistivity (Ω・cm) | >1012 |
| Chemical Purity (%) | 99.9996 |
| Refractive Index Inhomogeneity @632.8nm | <3×10-6 |
| Bulk Absorption Coefficient @10.6μm | <0.0005cm-1 |
| Thermo - optic Coefficient (dn/dT) @10.6μm | 6.1×10-5/℃ |
Standard Products:
| Size Specification | Profile Precision | Surface Form Precision | Parallelism Precision | Coating Wavelength Band |
| 10-100mm | ±0.05mm | λ/6@632.8nm | 10 arcseconds | 400-700nm,700-1100nm |
Why choose Zinc selenide (ZnSe) windows?
Zinc selenide (ZnSe) windows are favored for their high transmission across 0.6-16 μm (notably 8-14 μm LWIR), low dispersion, and thermal stability. With a moderate refractive index (n≈2.4@10 μm), they enable chromatic aberration correction in optical systems. Featuring high laser damage threshold, they suit CO₂ laser (10.6 μm) windows, IR imaging lenses, and spectrometer prisms. Though softer (Mohs ~2.5), ZnSe outperforms germanium in moisture resistance for humid environments.
Germanium (Ge) is widely used in far infrared wavelength,it is transparent from 2000nm to 17000nm.Germanium also has higher refractive index about 4 at 10.6 micron.Germanium is very popular in FLIR and imaging applications.Ge windows and lenses can be manufactured by MT-Optics,Inc.
Read More
Germanium Windows are made from Germanium material, which has transparent range from 2 to 17 micron. MT-Optics,Inc. can kindly process this Ge as windows, mirrors, lenses etc.
Read More
Sapphire is a single crystal aluminum oxide (Al2O3).Its Mohs hardness is 9,it is one of the hardest materials.Sapphire has good mechanical strength,and it is also transparent from visible to IR spectrum.So,it is always used as window material where scratch resistance is required.
Read More
Magnesium Fluoride (MgF2) is a tetragonal positive birefringent crystal.MgF2 has good chemical,mechanical and thermal characteristics compared with CaF2.Due to its high vacuum UV transmission and high damage threshold,MgF2 is usually used in VUV andexcimer laser windows,polarizers,lenses and etc.
Read More
Sapphire Window is an optical component crafted from sapphire material. It boasts a transparent range of 180 - 4500 nm, enabling transmission of light from the ultraviolet to the infrared spectrum. At 1000 nm, its refractive index is 1.755, contributing to its distinctive optical performance. Sapphire’s inherent hardness and thermal stability further enhance its utility in demanding environments.
Read More
MgF₂ (Magnesium Fluoride) Window is an optical component fabricated from magnesium fluoride, a material renowned for its broad transparent range spanning from 120 to 7000 nm. This extensive range allows transmission of light from the ultraviolet to the infrared spectrum. At 7000 nm, it exhibits a refractive index of 1.376, contributing to its unique optical properties.
Read More
Calcium Fluoride (CaF2) is a tetragonal positive birefringent crystal.MgF2 has good chemical,mechanical and thermal characteristics compared with CaF2.Due to its high vacuum UV transmission and high damage threshold,MgF2 is usually used in VUV andexcimer laser windows,polarizers, lenses and etc.
Read More
CaF2 Windows are made from Calcium Fluoride material, which has transparent range from 170-7800nm. The refractive index is 1.399 at 5000nm. It has little hygroscopic susceptibility and high thermal expansion coefficient. CaF2 Windows are relatively soft and somewhat hygroscopic so polishing, coating and handling are more critical than UV Fused Silica windows.
Read More
Zinc selenide (ZnSe) materials exhibit excellent light transmittance across a broad wavelength range (0.5μm to 22μm). They are commonly used as substrate materials for mirrors and beam splitters in high-power CO₂ laser systems. Additionally, their superior refractive index uniformity and consistency make them ideal for applications such as windows and lenses in thermal imaging systems, medical devices, industrial thermal radiation meters, and infrared spectrometers.
Read More
Zinc sulfide (ZnS) exists in two material forms: a white multispectral material and a yellow virgin material. Both are chemically inert, featuring high purity, insolubility in water, moderate density, and ease of processing. Due to its broad transmission wavelength range (500–10000 nm), zinc sulfide (ZnS) is widely used in manufacturing infrared windows, domes, and infrared optical components.
Read More
