Companies Specializing In The Production Of Grinding And Polishing Machines

Optical Glass and Optical Cold Working

Glass is a widely used and widely used inorganic non-metallic material, which can be applied in fields such as architecture, daily use, art, and instrumentation, with a wide variety of types. Optical glass refers to glass that can change the direction of light propagation and the relative spectral distribution of ultraviolet, visible, or infrared light. Can be used to manufacture lenses, prisms, reflectors, and windows in optical instruments. The components composed of optical glass are crucial components in optical instruments. Amorphous (glass state) optical media materials that transmit light can be used to make various optical components such as prisms, lenses, filters, etc. After passing through, the direction, phase, and intensity of light propagation can be changed. Narrowly defined optical glass refers to colorless optical glass; Broadly speaking, optical glass also includes colored optical glass, laser glass, quartz optical glass, radiation resistant glass, ultraviolet infrared optical glass, fiber optical glass, acousto-optic glass, magneto-optical glass, and photochromic glass. According to different requirements, optical glass can be divided into three categories: ① Colorless optical glass - optical glass that is almost completely transparent in a wide range of visible and near-infrared wavelengths and is widely used. There are hundreds of different grades based on refractive index and dispersion, which can be divided into two varieties: Crown brand optical glass (represented by K) and flint optical glass (represented by F). Crown brand glass is borosilicate glass, which becomes flint glass after adding alumina. The main difference between the two is that flint glass has a higher refractive index and dispersion, so it is often used to manufacture spectral components Radiation resistant optical glass - It has various properties of colorless optical glass and can remain essentially unchanged under radioactive irradiation. Used for receiving γ Optical instruments for irradiation have the same variety and grade as colorless optical glass. Its chemical composition is based on colorless optical glass, with the addition of a small amount of cerium dioxide to eliminate the color centers formed by high-energy radiation in the glass, making the light absorption change of this type of glass very small after irradiation Colored optical glass - has specific absorption or transmission properties for certain wavelengths of light. Also known as filter glass, there are over a hundred varieties. Color filters can selectively absorb certain colors, while neutral filters have the same absorption for all wavelengths of light, only reducing the intensity of the beam without changing its color. Interference filters reflect unwanted colors instead of absorbing them based on the principle of light interference.





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