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Sight Windows

Sight glasses are used for observation in scientific, industrial, medical, and other applications. Materials for glass and metal have to correspond to corrosion requirements, operating temperature, pressure and optical transmission. more…

Sapphire Windows

Sapphire (alpha-Al2O3 crystal) is a synthetic material, with melting point 2040 C. It's single crystal. Sapphire crystals belong to the Rhombohedral class 3m system. Sapphire is a very hard material, chemically inert. Sapphire has a nice thermoconductivity. As well as a high dielectric constant and low loss tangent. more…

Germanium Windows

Germanium (Ge crystal) is a synthetic material, with melting point 937 C. It`s single crystal, which is growing by Czohralski method. Germanium belongs to the cubic crystal class m3m. Germanium crystals have a very high refractive index. Germanium crystals are very good known as semiconducting material. The first transistor was obtained with Germanium. more…

Calcium Fluoride Windows

Germanium (Ge crystal) is a synthetic material, with melting point 937 C. It`s single crystal, which is growing by Czohralski method. Germanium belongs to the cubic crystal class m3m. Germanium crystals have a very high refractive index. Germanium crystals are very good known as semiconducting material. The first transistor was obtained with Germanium. more…

Zinc Selenide Windows

Zinc Selenide (ZnS crystal) is a synthetic material, with melting point 1517 C. It`s polycrystalline material. ZnSe belongs to the cubic crystal class 43m or hexagonal crystal class 6mm. Zinc Selenide is chemically inert, resistant to thermal shock. ZnSe has extremely low bulk losses, and is easily machined. more…

Crystal Quartz Windows

Crystal Quartz (SiO2) is synthetic or natural material, with melting point 1470 C. It`s single crystal, which is growing by hydrothermal method. Crystal Quartz (alpha - SiO2 lower 573.5 C) belongs to the trigonal crystal class 32. It has low stress birefringence and high refractive index. Crystal Quartz doesn't have a center of the symmetry. That is why it is piezoelectric and has electrooptics and non-liner optics properties. more…