How much do you know about the classification of optical glass?

How much do you know about the classification of optical glass?

Optical Classification

1. Colorless optical glass

There are specific requirements for optical constants, such as high visible light transmission and no selective absorption coloration. According to the size of Abbe number, it is divided into enamel and flint glass. The types are classified into several types according to the refractive index, and are arranged in order of refractive index. It is used as a lens, prism, mirror, etc. for telescopes, microscopes, cameras, etc.

2, anti-irradiation optical glass

High absorption of high energy radiation, 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 , the medical field, etc. as a shielding and peep window material.

3. Irradiation resistant optical glass

Under certain gamma-ray and X-ray irradiation, the transmittance in the visible region changes less. The varieties and grades are the same as the colorless optical glass, and are used to manufacture optical instruments and peep windows under high-energy irradiation.

4, colored optical glass

Also known as filter glass. Selective absorption and transmission properties for specific wavelengths in the UV, visible, and infrared regions. Divided into selective absorption, cut-off, and neutral ash according to spectral characteristics. Divided into ion coloring, metal colloid coloring, and sulfur selenium according to the coloring mechanism. The compound coloring class 3 is mainly used to manufacture filters.

5, UV and infrared optical glass

It has specific optical constants and high transmittance in the ultraviolet or infrared range 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 and good chemical properties. It is used to manufacture prisms, lenses, windows and mirrors with special requirements for various wavelengths. In addition, there are photomasks for large-scale integrated circuit manufacturing, liquid crystal display panels, and image-based disc-based thin-plate glass; magneto-optical glass that rotates when the light passes through the glass in the direction of magnetic lines of force; light is transmitted in a certain direction. In the case of ultrasonic glass, acousto-optic glass in which light is diffracted, reflected, concentrated, or optically shifted occurs.

In addition, if there is a need to purchase optical glass, then it is important to choose a brand, because even the optical glass of the defective product, the error is very small, after all, if there is no professional instrument, the naked eye can not distinguish, after all, those The quality of large manufacturers is better than that of small manufacturers.