Optical glass and optical element

Abstract

The invention discloses an optical glass and an optical element. The optical glass consists of the following components: 28 to 43 by weight percent of SiO2; 23 to 33 by weight percent of TiO2; 6 to 20 by weight percent of BaO; and 6 to 20 by weight percent of R2O; and R2O consists of K2O and / or Na2O. As shown by an experiment result, the optical glass is not added with clarificant, and does not need to be added with non-environment-friendly elements, the refractive index is 1.72 to 1.82, the Abbe number is 24 to 29, the corresponding wavelength is less than 420mm when the transmissivity is upto 80 percent, and thereby the need of modern imaging devices is satisfied.

Description

technical field [0001] The invention relates to the technical field of glass, and more specifically relates to an optical glass and an optical element. Background technique [0002] In recent years, with the increasing popularity of digital cameras, digital video cameras, camera phones, etc., the demand for optical glass as its components has continued to expand, and higher requirements have been put forward for the performance of optical glass. [0003] The existence of defects such as residual bubbles and foreign matter in optical glass brings great harm to optical glass, especially optical glass used in imaging optical systems of image sensors, so it is necessary to suppress the occurrence of defects. For example, when the glass raw material is melted, the molten glass is easily corroded by the container, and a part of the container is mixed into the glass as fine particles and fragments, resulting in foreign matter in the optical glass. Therefore, in order to suppress t...

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Problems solved by technology

[0004] However, the introduction of clarifiers has adverse effects on the environment, and they usually need to be used in conjunction with nitrates, which increases emissions of nitrogen oxides

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