Optical quartz sight glass, which have the advantages of high temperature and high pressure, can not be replaced by other optical materials. Quartz sight glass has good UV transmittance, and the absorption of visible light and near infrared light is very low, so it is the basic material for the production of optical fiber. The thermal coefficient is very small, and the chemical property is good. Bubbles, streaks, homogeneity and birefringence are comparable with ordinary optical glass. They are the best optical materials for working under severe conditions.
Quartz view glass experimental temperature: 1200 degrees, softening temperature is: 1730 degrees, the specific parameters are as follows:

 
1. (far ultraviolet quartz sight glass) corresponding to JGS1 grade it is made of quartz glass melting high purity hydrogen, so contain a large number of base (2000ppm), with ultraviolet transmittance and excellent performance, especially in the short wave ultraviolet region, the transmittance is better than all other glass, in 185 m the transmission rate of up to 90%, synthetic quartz glass has a strong absorption peak at 2730nm, no particle structure. It is an excellent optical material in the range of 185-2500m band.
2. (UV optical quartz glass view mirror) corresponding to the brand JGS2
Quartz sight glass, produced by quartz materials and hydrogen oxygen flame, contains dozens of PPM metal impurities. There are absorption peaks at 2730nm (base content 100-200ppm), with stripe and particle structure. It is a good material through the range of 220-2500 micron m.
3. (infrared optical quartz sight glass) corresponds to the quartz glass produced by quartz material and vacuum electrofusion method JGS3, which contains several ppm metal impurities. There are small bubbles, particle structure and stripe, almost no (OH), and high transmittance and transmittance of up to 85%, and its optical waveband range is 260-3500 m.
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