Optical glass, prefabricated part, optical element and optical instrument

Abstract

The invention provides optical glass which comprises, in weight percent, 41-58% of SiO2, 18-32% of TiO2, 3-18% of Na2O, 2-15% of K2O and 2-15% of BaO, wherein Na2O / (Na2O+K2O) is 0.3-0.85. By the aid of reasonable component design and ratio, the optical glass meets expected refractive index and abbe number and has low heat expansion coefficient.

Description

Technical field [0001] The invention relates to an optical glass, in particular to an optical glass with a refractive index of 1.63-1.71 and an Abbe number of 28-35. Background technique [0002] In recent years, with the rapid popularization and use of digital cameras, camcorders and camera phones, optical materials have also developed rapidly in the direction of high precision and miniaturization. With the continuous integration of optics, electronic information science, and new material science, optical glass, which is the basic material of optoelectronics, has made rapid progress in the application of optical transmission, optical storage, and photoelectric display. In recent years, optical components and optical instruments have developed rapidly in terms of digitization, integration and high-definition, and higher requirements have been placed on the performance of optical glass used in optical components of optical instruments and equipment. [0003] Optical glass with a re...

AI Technical Summary

Problems solved by technology

Due to the large thermal expansion coefficient of optical glass, it is easy to cause cracks during processing, which reduces the yield rate of glass; at the same time, its thermal shock resistance is also poor. It is used in vehicles, monitoring security and other fields, which will reduce the use of optical glass. life

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