Zinc Sulfide (ZnS)

VOT provides both multispectral (visible through 3-5µm and 8-12µm IR ranges) Zinc Sulfide and regular IR grade Zinc Sulfide lenses and blanks, produced using the Chemical Vapor Deposition (CVD) process. Zinc Sulfide (ZnS) can be classified into infrared ZnS and multispectral Zinc Sulfide, with the latter obtained from infrared ZnS through a hot isostatic pressing treatment. IR Zinc Sulfide lenses display a high level of index of refraction homogeneity and offer imaging uniformity across the 8-12 µm waveband.

Due to its excellent transmission in visible through infrared wavebands, multispectral ZnS is ideal for systems utilizing various sensors such as visible, infrared, near-infrared, short-wave infrared, mid-wave infrared, and long-wave infrared. Multispectral ZnS features high purity, is insoluble in water, has moderate density, and is easy to process, making it widely used in the manufacture of IR windows and IR optical components. Additionally, multispectral ZnS has low absorption, wide transmission range, and high transmittance in both visible and infrared bands, including the mid-infrared. Compared to ZnSe, multispectral ZnS also offers higher hardness, fracture strength, and resistance to harsh environments, making it suitable for external infrared window materials in aerospace applications.