chalcogenide glass

Chalcogenide glass lenses，window，prism are  made of chalcogenide glass, which are glass materials composed of chalcogen elements (S, Se, Te) combined with other elements such as As, Sb, or Ge. Chalcogenide glass features a broad IR transmission wavelength range in the MWIR/LWIR region (3-5 micro,8-12 micro) with a superior transmission rate within the range. The thermal properties of Chalcogenide glass lenses are also remarkable, with low temperature coefficients of refractive index, Chalcogenide glass lenses are attractive candidates for producing passive optical athermalized IR lens assemblies of compact and lightweight design. Furthermore, Chalcogenide glass has a lower softening point and mechanical hardness than common crystal materials, therefore could be processed into various optical components with higher efficiencies.

Low cost

Small temperature coefficients of refractive index, excellent for producing athermalized lens assemblies

Wide wavelength range covering MWIR (3-5µm) and LWIR (8-12µm)

Various lens forms (spherical or aspheric) customizable