Optical glass

Abstract

The invention discloses optical glass. The optical glass is prepared from the following components in percentage by weight: 33% to 48% of SiO2, 35% to 52% of RO, 3% to 11% of B2O3, 0.5% to 8% of Al2O3, and 3% to 12% of ZnO; the RO is one or more of MgO, CaO, SrO, and BaO. According to the optical glass, by optimizing a formula and proportioning relationship, moisture resistance stability and thermal stability of the optical glass are significantly improved under the circumstance that no other expensive metals is added, and the moisture resistance stability of the optical glass can reach a first class standard.

Description

technical field [0001] The invention relates to the technical field of environmentally friendly optical glass, and more specifically, the invention relates to optical glass and optical preforms, optical elements and optical instruments made of the optical glass. Background technique [0002] With the continuous integration of optics, electronic information science, and new material science, the application of optical glass as the basic material of optoelectronics in the fields of optical transmission, optical storage, and optoelectronic display has advanced by leaps and bounds. In recent years, optical components and optical instruments have developed rapidly in terms of digitalization, integration and high precision, and higher requirements have been put forward for the performance of optical glass used in optical components of optical instruments and equipment. [0003] During the manufacture and use of optical glass components, the ability of the polished surface to resis...

AI Technical Summary

Problems solved by technology

Optical glass for precision stamping usually has the disadvantage of poor chemical durability, which is not conducive to subsequent processing and even affects the quality of the glass

For optical glass with poor chemical durability, in the subsequent polishing and cleaning process, measures such as protective coating need to be taken, and the yield rate is low, which increases the process and cost

If the moisture resistance level of the glass is low, the polished glass surface is easily corroded by water vapor in the air and scrapped during cleaning, drying, transportation, etc.

In addition, the phenomenon that the volume of optical glass increases with the increase of temperature is called thermal expansion. The thermal expansion coefficient is an important indicator for evaluating the thermal stability of optical glass. The higher the thermal expansion coefficient of optical glass, the worse the thermal stability. less secure

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