Chemical vapor deposition zinc sulfide（CVD ZnS） is an important infrared window material, which is widely used in infrared devices and instruments such as infrared safety alarm, infrared radiation temperature measurement, infrared medical equipment, resource exploration, weather forecast, agricultural yield estimation, etc. At present, Yong Hee Photonics can prepare a variety of chemical vapor deposition zinc sulfide products including standard CVD ZnS / multispectral ZnS and elemental ZnS. The standard CVD ZnS has excellent optical transmission properties in the long wavelength infrared band (8-12µm), good mechanical strength and environmental stability.