The definition of optical quartz sight glass

The definition of optical quartz sight glass
Optical sight glass is the main material for making optical lenses and optical instruments. Optical sight glass is an ordinary borosilicate sight glass raw material added to the light, such as AgCl, AgBr, and so on, and then add a very small amount of sensitizers, such as CuO, so that the sight glass is more light to light. Optical sight glass must have high Abbe number, refractive index and height, and high uniformity. Optical sight glass is mixed with high purity silicon, boron, sodium, potassium, zinc, zinc, lead, magnesium, calcium, barium and so on. It is melted in the white gold crucible at high temperature. It is stirred with ultrasonic wave and the bubble is removed. Then the sight glass blocks are cooled for a long time to avoid the internal stress of the sight glass block. After cooling, the sight glass block must be measured by optical instrument to check whether the purity, degree, evenness, refractive index and dispersion rate conform to specifications. Qualified sight glass blocks were heated and forged to form light lens embryos.

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