Compared with ordinary silicate glass, transparent quartz glass exhibits excellent transmittance throughout the entire wavelength head. The spectral transmittance in the infrared region is greater than that of ordinary glass; In the visible area, the transmittance of quartz glass is also relatively high. In the ultraviolet spectral region, especially in the shortwave ultraviolet region, the spectral transmittance is much better than other glasses.

The spectral transmittance is influenced by three factors: reflection, scattering, and absorption. The reflection of quartz glass is generally 8%, with a larger ultraviolet region and a smaller infrared region. So the transmittance of quartz glass is generally not greater than 92%. The scattering of quartz glass is relatively small and can generally be ignored. Spectral absorption is closely related to the impurity content and production process of quartz glass; The transmittance in the wavelength range below 200 nanometers represents the amount of metal impurities present; The absorption of 240 sodium meters represents the amount of hypoxic structure; The absorption in the visible band is caused by the presence of transition metal ions, and the absorption of 2730 nm is the absorption peak of hydroxyl groups, which can be used to calculate the hydroxyl content.

Method for calculating spectral transmittance using spectral absorption hydroxyl groups: AGE company's calculation formula: C=910/T * LOG10 (Ta/Tb) mm-1C: hydroxyl content (C, ppm) T: thickness (mm) Ta: 2600 nm wavelength transmittance Tb: 2730 nm wavelength transmittance B: China's standard calculation formula: C=96.5/d * LG10 (Ia/I) mm-1C: hydroxyl content (ppm) d: thickness (cm) Ia: 2730 nm baseline to zero distance (mm) I: 2730 nm absorption peak to zero distance (mm) Spectral transmittance: thickness 1mm) The spectral transmittance of other thicknesses can be derived using the formula: T=(1-R) 2e at T: transmittance R: single reflection loss. e: Natural logarithm radix. t: Thickness (cm) Spectral transmittance wavelength nm

The formation of quartz sheets is caused by the high temperature viscosity of their melt. It is widely used in the production of semiconductors, electro-optic sources, semiconducting communication devices, lasers, optical instrument, laboratory instruments, electrical equipment, medical equipment, high-temperature and corrosion resistant chemical instruments, chemical industry, electronics, metallurgy, building materials, national defense and other industries. The quartz pieces produced by Beijing Zhongcheng Quartz Glass Products Co., Ltd. have high precision, no bubbles, flat and smooth surface, corrosion resistance, and good light transmittance, and are especially suitable for observation windows of optical, electronic, chemical, military and other optical instrument.