Infrared Optics
CVD ZnS
ZnS is grown by chemical vapor deposition (CVD) method, for windows,domes and lenses for thermal-imaging system. CVD ZnS, which appears orange, mainly works in Far-infrared region Multi-spectrum. ZnS..

ZnS is grown by chemical vapor deposition (CVD) method, for windows,domes and lenses for thermal-imaging system.
CVD ZnS, which appears orange, mainly works in Far-infrared region Multi-spectrum. ZnS (M-ZnS) shows excellent optical properties across the full band of 0.4-12μm, can be used in Far-, Mid-, Near-infrared and visible regions. CVD ZnS windows, lenses and domes with size up to Ø250×16mm. For M-ZnS, the maximum size is 300×200×15mm.
Growing Method | Chemical Vapor Deposition(CVD) |
Melting Point | 1700℃ |
Transmission Band | 3-12μm |
Bulk Absorption Coefficient | <0.24cm-1@10.6μm |
Density | 4.08g/cm3 |
Refractive Index | 2.200 at 10.6μm |
Mohs Hardness | 3 |
Young's Modulus | 74.5 GPa |
Thermal Conductivity | 0.167W/cm/℃ @20℃ |
Specific Heat | 0.112cal/g/℃ |
Thermal Expansion | 7.85x10-6/℃ at 20℃ |
Material: | ZnS |
Dimension Tolerance: | +0.0/-0.1mm |
Thickness Tolerance: | ±0.1mm |
Surface quality: | 60/40 |
Clear Aperture: | >85% |
Flatness: | λ/2@633nm |
Parallelism (Centration): | 3' |