With the rapid development of military weapons and related targeting and monitoring systems, ZnS is widely used in multispectral infrared applications.
Its relatively high transmittance through 3-5µm and 8-10µm makes ZnS ideal for multispectral applications. Furthermore, in the NIR and SWIR ranges, CLEARTRAN CVD ZnS can also be considered an indispensable alternative for optical designers.
Bote ZnS lenses are particularly suitable for systems involving visible light cameras, medium and long wave detectors, and laser rangefinders for designated targets.
Bote CLEARTRAN ZnS windows are also available as external windows for specific sensor applications.
Is Zinc Sulfide Dangerous？
Zinc sulfide (ZnS) is generally safe in its solid form, commonly used in optics and coatings. However, inhaling its dust or fumes during processing can irritate the respiratory system. Proper handling, protective gear, and ventilation are recommended to minimize risks.
| Zinc Sulfide | Business Standard | Factory Standard | Ultra Precision Standard |
| Diameter Tolerance（mm） | +0/-0.20 | +0/-0.10 | +0/-0.025 |
| Center Thickness（mm） | ±0.20 | ±0.15 | ±0.025 |
| Radius（%） | ±2% | ±1.5% | ±1% |
| Focal Length Tolerance（%） | ＜3% | <1.0% | <1.0% |
| Surface Smoothness | 80-50 | 60-40 | 40-20 |
| Diameter, Thickness Ratio | 9~50:1 | ||
| Coating | <2.0%@ VIS-SWIR , <1.5% @ 3~5µm or 8~12µm | ||
| Materials | CVD Zinc Sulfide and CLEARTRAN CVD ZnS | ||
Bote ZnS lenses are also available with AR coating upon specific request. Please use extreme caution when handling, installing, and cleaning ZnS lenses, and for your safety, follow all appropriate precautions, including wearing gloves when handling these lenses and washing your hands thoroughly afterward