Glass that can change the direction of light propagation and can alter the relative spectral distribution of ultraviolet, visible or infrared light is called Optical Colored Filter Glass. It is an inorganic glassy material that transmits light through refraction, reflection, or transmission, or changes the intensity or spectral distribution of light by absorbing. It has stable optical properties and optical uniformity.
Subei Optics specializes in Optical Colored Filter Glass,Coating Filter Glass,and Transparent Glass Windiow.
Optical Colored Filter Glass possesses transparency, uniformity in terms of both chemistry and physics (structure and properties), and optical constants. It can be classified into series of silicate, borate, phosphate, fluoride and chalcogenide compounds. There are numerous varieties, and they are mainly categorized based on their positions on the refractive index (nd) - Abbe value (vd) graph. Traditionally, glasses with nd > 1.60 and vd > 50 and nd > 55 are classified as crown (k) glass, while the rest are classified as flint (f) glass. Crown glass is generally used as convex lenses, and flint glass as concave lenses. Generally, crown glass belongs to the alkali borosilicate system, light crown glass belongs to the aluminosilicate system, heavy crown glass and barium flint glass belong to the alkali-free borosilicate system, and most flint glass belongs to the lead potassium silicate system. With the continuous expansion of the application fields of optical glass, its varieties are constantly increasing, and its composition almost includes all elements in the periodic table.