Optical glass is glass that can change the direction of light propagation and can change the relative spectral distribution of ultraviolet, visible, or infrared light. Narrow optical glass refers to colorless optical glass; broadly defined optical glass also includes colored optical glass, laser glass, quartz optical glass, anti-radiation glass, ultraviolet infrared optical glass, fiber optical glass, acousto-optic glass, magneto-optic glass, and photochromic glass. Optical glass can be used to manufacture lenses, prisms, mirrors, and windows in optical instruments. Components made of optical glass are key optical components in optical instruments.
Optical glass is the foundation and important part of the optoelectronic technology industry. Especially after the 1990s, with the continuous fusion of optics, electronic information science, and new materials science, the application of optical glass as the basic material of optoelectronics in the three fields of optical transmission, optical storage, and the optoelectronic display has made rapid progress Social informatization, especially one of the basic conditions for the development of optoelectronic information technology.
With the sustained and stable development of China's economy, China's optical glass manufacturing industry has developed rapidly. According to data from the National Bureau of Statistics, in 2010, the number of enterprises above designated size in the optical glass manufacturing industry reached 246, and the industry's annual sales revenue was 23.405 billion yuan, an increase of 53.70% year-on-year; profit was 1.537 billion yuan, an increase of 87.10% year-on-year; The scale reached 26.450 billion yuan, a year-on-year increase of 77.49%. Since the optical glass manufacturing industry is dominated by domestic sales, the impact of the financial crisis is relatively small, and the industry still shows a good growth momentum.
Optical glass is a glass material used for manufacturing optical spherical lenses, prisms, reflectors, high precision optical windows, etc. Including colorless optical glass (usually referred to as optical glass), colored optical glass, radiation-resistant optical glass, radiation-resistant glass and optical quartz glass. The optical glass dome has a high degree of transparency, a high degree of uniformity in chemistry and physics (structure and performance), and has a specific and precise optical constant. It can be divided into silicate, borate, phosphate, fluoride, and chalcogenide series. There are many varieties, mainly classified according to their position in the refractive index (nD)-Abbe number (VD) chart. Traditionally, all types of glass with nD> 1.60, VD> 50, and nD <1.60, VD> 55 are designated as crown (K) glass, and the remaining types of glass are designated as flint (F) glass. Crown glass is generally used as a convex lens, and flint glass is used as a concave lens. Generally, crown glass belongs to alkali-containing borosilicate system, light crown glass belongs to aluminosilicate system, heavy crown glass and barium flint glass belong to alkali-free borosilicate system, most of the flint glass belongs to lead potassium silicate system. With the continuous expansion of the application field of optical glass, its variety is constantly expanding, and its composition includes almost all elements in the periodic table.
An inorganic glassy material that transmits light through refraction, reflection, transmission, or changes the intensity or spectral distribution of light through absorption. With stable optical properties and high optical uniformity.