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 properties, the choice of optical glass material is very important.
Optical glass can change the direction of light transmission, and can change the relative spectral distribution of ultraviolet, visible or infrared light. Optical glass has stable optical properties and high optical uniformity, and has the advantages of high temperature resistance, low expansion coefficient, high mechanical strength, and good chemical properties. It is used to make prisms, lenses, windows and mirrors, etc.
1. Optical glass is chemically stable - resistant to corrosion by chemical substances such as acid and alkali.
2. The refractive index of optical glass is constant and accurate ---- the refractive index is 1.523, which is constant and accurate, and the diopter is accurate after processing.
3. Optical glass absorbs ultraviolet rays ---- to avoid damage to the eyes by ultraviolet rays.
4. Optical glass has high light transmittance ---- light transmittance can reach 92%, if one or more layers of magnesium fluoride antireflection film are coated on the surface of the lens, the light transmittance of the lens can reach 99.2%.