Why use quartz stone material to process optical glass?

Quartz stone material is often used to process optical glass, mainly because it has the advantages of high purity, good optical properties, thermal stability and chemical stability. The following is a concrete analysis:

High purity: The main component of quartz stone is silicon dioxide (SiO₂), with high purity and low impurity content. This makes it possible to reduce the phenomena of light absorption and scattering caused by impurities after being processed into optical glass, so as to ensure that the optical glass has good transparency and optical uniformity and meet the requirements of high-precision optical instruments for imaging quality.

Good optical properties

High transmittance: Shi Ying glass has high transmittance in ultraviolet, visible and near infrared bands. For example, in the ultraviolet band, ordinary optical glass tends to absorb strongly, while Shi Ying glass can maintain high transmittance, which makes it have important applications in ultraviolet instruments, such as ultraviolet microscope and ultraviolet spectrometer.

Low dispersion: Quartz material has low dispersion, that is, when light with different wavelengths propagates in it, the speed difference is small, which can reduce the color difference in the optical system. This is very important to improve the imaging resolution and clarity of optical instruments such as microscopes, which can make different colors of light focus on the same plane and form clear and accurate images.

Good thermal stability: Shi Ying glass has a low thermal expansion coefficient, and can maintain dimensional stability in a large temperature range. In the use of optical instruments, especially in some occasions where high-precision positioning and imaging are needed, temperature changes may lead to the deformation of lenses, thus affecting optical performance. The low thermal expansion coefficient of Shi Ying glass can effectively reduce this effect and ensure the stability and accuracy of the optical system. For example, in astronomical telescope, Shi Ying glass lens can keep good optical performance at different ambient temperatures, which is helpful to observe clearer celestial images.

Strong chemical stability: Shi Ying glass has good chemical stability and is not easily corroded by chemicals such as acid and alkali. This enables the optical glass lens to resist the corrosion of chemicals in the external environment and maintain the stability of surface smoothness and optical performance during long-term use. In some harsh use environments, such as humid laboratory or industrial production environment, Shi Ying glass lens can better withstand the influence of chemicals and prolong its service life.