These advantages of optical glass, after reading my letter!
A glass that changes the direction of light propagation and can change the relative spectral distribution of ultraviolet, visible or infrared light is called an optical glass. The optical glass has a low dispersion coefficient at high refractive index, good hardness, easy dyeing, good light transmission, and the lens is relatively thin, UV-resistant, suitable for full-frame glasses, and the refractive index of the glass lens is 1.7-1.89.
What are the advantages of optical glass? Let's take a look at it together.
(1) The optical glass has high transmittance and the light transmittance can reach 92%. If the surface of the lens is coated with one or more layers of magnesium fluoride antireflection film, the transmittance of the lens can reach 99.2%.
(2) Optical glass absorbs ultraviolet rays and avoids damage to the eyes caused by ultraviolet rays.
(3) Optical glass is chemically stable and resistant to corrosion by chemicals such as acids and alkalis.
(4) The refractive index of the optical glass is constant and accurate, the refractive index is 1.523, constant and accurate, and the diopter after processing is accurate..
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Optical glass molding technology is widely used