What Are The Categories Of Optical Glass.

Glass is a widely used and widely used inorganic non-metallic material, which can be used in construction, daily use, art, meters and other fields, and the types are very rich. In addition to the commonly used tempered glass, printed glass, there are optical glass, dimming glass and other types with high technical requirements. In this article, we will introduce the types of optical glass:

What are the categories of optical glass

1. Colorless optical glass

It has specific requirements for optical constants, and has the characteristics of high transmittance in the visible region and non-selective absorption coloring. According to the size of the Abbe number, it is divided into crown and flint glass, and all kinds of glass are divided into several kinds according to the refractive index, and arranged according to the refractive index. It is widely used as lens, prism, mirror for telescope, microscope, camera, etc.

2. Anti-radiation optical glass

It has a large absorption capacity for high-energy irradiation, and there are high lead glass and CaO-B2O2 system glass, the former can prevent gamma rays and X-ray irradiation, the latter can absorb slow neutrons and thermal neutrons, mainly used in the nuclear industry, medical fields and so on as shielding and peephole window materials.

3. Radiation resistant optical glass

Under a certain γ-ray and X-ray irradiation, the transmittance of the visible area changes less, and the variety and grade are the same as that of colorless optical glass, which is used to manufacture optical instruments and peep Windows under high-energy irradiation.

4. Colored optical glass

Also known as filter glass. It has selective absorption and transmission properties for specific wavelengths in ultraviolet, visible and infrared regions, and can be divided into selective absorption type, cut-off type and neutral gray type according to spectral characteristics. According to the coloring mechanism, it is divided into ion coloring, metal colloid coloring and sulfur selenide coloring 3 categories, mainly used in the manufacture of light filters.

5. Ultraviolet and infrared optical glass

It has a specific optical constant and high transmittance in the ultraviolet or infrared band, and is used as an ultraviolet or infrared optical instrument or as a window material.

6. Optical quartz glass

With silica as the main component, it has the characteristics of high temperature resistance, low expansion coefficient, high mechanical strength, good chemical properties, etc. It is used to manufacture prisms, lenses, Windows and mirrors with special requirements for various wavebands. In addition, there are photomask plate, liquid crystal display panel, image disc base sheet glass for large-scale integrated circuit manufacturing; A magneto-optical glass in which the polarization plane rotates when light passes through the glass along the direction of the magnetic field line; When light passes through the glass transmitting ultrasonic wave in a certain direction, the acousto-optic glass with light diffraction, reflection, convergence or optical frequency shift occurs.