Colorless optical glass is a type of material designed for optical applications where transparency and minimal coloration are essential. It must exhibit high visible light transmission and avoid any selective absorption that could cause discoloration. These glasses are categorized based on their Abbe number into crown (low dispersion) and flint (high dispersion) types. They are further divided by refractive index, arranged in order from low to high. This type of glass is commonly used in lenses, prisms, mirrors, and other components in telescopes, microscopes, and cameras. Anti-irradiation optical glass is specifically engineered to absorb high-energy radiation such as gamma rays and X-rays. Lead-based glasses are effective against gamma and X-ray exposure, while calcium borate (CaO-B₂O₃) system glasses are ideal for absorbing slow and thermal neutrons. These materials are widely used in nuclear power plants, medical imaging equipment, and other environments where radiation shielding is critical. Irradiation-resistant optical glass maintains stable optical properties even after exposure to gamma or X-ray radiation. Its transmittance in the visible spectrum remains largely unchanged under such conditions. These glasses are similar in variety and grade to colorless optical glass and are used in optical instruments and viewing windows in high-radiation settings. Colored optical glass, also known as filter glass, selectively absorbs or transmits specific wavelengths of light in the ultraviolet, visible, and infrared regions. Based on spectral characteristics, it can be classified into selective absorption, cutoff, and neutral gray types. By coloring mechanism, it includes ion-doped, metal colloid, and sulfur/selenium-based varieties. This type of glass is primarily used in filters for scientific and industrial applications. Ultraviolet and infrared optical glass is designed to have high transmittance in the respective wavelength ranges. These materials are essential for specialized optical instruments and as window materials in UV or IR systems, such as spectrometers and thermal imaging devices. Optical quartz glass is composed mainly of silica (SiO₂) and offers excellent thermal resistance, a low coefficient of thermal expansion, high mechanical strength, and good chemical stability. It is widely used in precision optical components like prisms, lenses, and mirrors that require performance across a broad range of wavelengths. In addition to standard optical components, quartz glass is also used in advanced applications such as photomasks for integrated circuit manufacturing, liquid crystal display panels, and optical discs. Specialized variants include magneto-optic glass, which rotates polarized light in the direction of a magnetic field, and acousto-optic glass, which allows light to be diffracted, reflected, or focused using sound waves. These unique properties make quartz glass indispensable in modern optics and photonics. Villa door , aluminum security door , high security front door Foshan Nanhai Jinfancheng Metal Building Materials Products Co., Ltd. , https://www.landrandoor.com
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In addition, the maintenance cost of aluminum villa doors is relatively low, and daily cleaning is relatively convenient. Just wipe them regularly to keep the doors as bright as new.
Optical glass classification
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In terms of material properties, aluminum has a low density, which makes aluminum doors relatively light and convenient for installation and daily use. Moreover, aluminum has good corrosion resistance, is not easy to rust, can adapt to various outdoor environments, and can maintain a good appearance after long-term use.