Optical glass can change the direction of light transmission, and can change the relative spectral dispersion of ultraviolet, visible or infrared light. Optical glass has stable optical properties and high optical uniformity. Optical glass has the advantages of high temperature resistance, low expansion coefficient, high mechanical strength, and good chemical properties. It is used to make prisms, lenses, Window and mirror, etc.

The optical glass lens is an indispensable component in the machine vision system, which directly affects the quality of the image and the realization and effect of the algorithm. Since different glass types have different characteristics, it is very important to choose optical glass materials.

About the advantages of optical glass:

　　1. High light transmittance of optical glass ----The light transmittance can reach 92%. If one or more layers of magnesium fluoride antireflection film are plated on the surface of the lens, the light transmittance of the lens can reach 99.2%.

　　 2. Optical glass is chemically stable-resistant to corrosion by chemicals such as acids and alkalis.

　　3. The refractive index of the optical glass is constant and accurate ---- The refractive index is 1.523, which is constant and accurate, and the refractive index is accurate after processing.

　　4. The optical glass absorbs ultraviolet rays ---- to avoid the damage of ultraviolet rays to the eyes.