Optical glass is the glass that can change the direction of propagation of light, and can change the relative spectral distribution of ultraviolet, visible or infrared light.
Optical glass in a narrow sense refers to colourless optical glass, and optical glass in a broad sense also includes tinted optical glass, laser glass, quartz optical glass, radiation-resistant glass, ultraviolet-infrared optical glass, fibre optical glass, acousto-optic glass, magneto-optic glass and photochromic glass.
Optical glass is used in the manufacture of lenses, prisms, mirrors and windows in optical instruments. Components made of optical glass are key elements in optical instruments.
