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.
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