Zinc Sulfide Multispectral Windows are manufactured from a water-free, multi-spectral grade of zinc sulfide that has low absorption and scatter properties over its broad transmission range of 0.4 - 12μm.
Like our Zinc Selenide Windows, Zinc Sulfide Multispectral is a chemically vapor deposited material which is commonly used in thermal imaging. With its excellent transmission properties in the visible and infrared, Zinc Sulfide Multispectral is the material of choice for systems that have both visible and mid-wave or long-wave infrared sensors. It is slightly harder and more chemically resistant than zinc selenide.
| Growing Method | Chemical Vapor Deposition(CVD) |
| Melting Point | 1700℃ |
| Transmission Band | 3-12um |
| Bulk Absorption Coefficient | <0.24cm-1@10.6um |
| Density | 4.08g/cm3 |
| Refractive Index | 2.200 at 10.6um |
| 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℃ |
| Diameter | +0/-0.10mm |
| Length | ±0.1mm |
| Chamfer | 0.20+/-0.10mm @ 45° |
| Flatness(@10.6mm) | λ/10 @ 10.6μm |
| Parallelism | < 40 arc Seconds |
| Perpendicularity | < 5 arc min |
| Surface Quality | 40/20 |
