ZnS optical components
SINOPTIX supplies various optical components made of optical grade Zinc Sulfide. ZnS is a clear to slightly yellowish material, partially transparent in the visible, with two main grades : multispectral or FLIR.
Zinc Sulfide characteristics
Zinc Sulfide substrates used by SINOPTIX are manufactured by CVD (Chemical Vacuum Deposition) technology in China.
ZnS properties chart
| Material denomination | Zinc Sulfide |
| Chemical elements | ZnS |
| Refractive index | 2.2 in the visible (2.89 @ FLIR) |
| Transmission range | 0.37 µm to 14µm |
| Density | 4.09 g/cm3 |
| Hardness | 210-240 kg/mm2 |
| Young’s modulus | 74.5 GPa |
| Thermal expansion | 6.8*10-6 °K-1 |
| Thermal conductivity | 16.7 W/(m*°K) |
| Melting point | 1293 °K (1020°C) |
Please visit our complete guide on ZnS optics to know more.
Zinc Sulfide optical components capabilities
Manufacturing capabilities
| Properties | Values |
|---|---|
| Available dimensions | Diam 3 to D200mm |
| Dimensional tolerances | +/-0.05mm |
| Thickness | up to 100mm |
| Surface quality | S&D : 40/20 |
| Flatness | lambda/2 |
| Roughness | Lambda/20 nm |
| Parallelism | better than 5″ |
| Thickness tolerance | +/- 0.02mm |
| Centration | 30 to 60 arcsec |
| Coatings | multispectral AR or 7.5-12µm (thermal) AR |
SINOPTIX ZnS optical components references:
Available Zinc Sulfide components
Below components are commonly used in the field of thermal imaging, medicine, night vision or defence.
We can propose below kinds of optical components :
-
- ZnS windows
- ZnS lenses
- ZnS domes
- ZnS prisms
Zinc Sulfide as an solution for IR applications
ZnS has a good optical transmission in the thermal IR (8 to 12µm) and mid-IR. Optical transmission can also be enhanced on the visible range with the multrispectral ZnS grade. It is therefore a very interesting material for IR / Thermal cameras and sensors.
Moreover the material can resist to harsh working conditions, which is an advantage for outdoor applications.