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Optical glass and optical element

A technology for optical glass and optical components, applied in optical components, optics, instruments, etc., can solve problems such as adverse environmental effects of clarifiers and increased nitrogen oxide emissions

Active Publication Date: 2010-10-13
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Optical glass and optical element
  • Optical glass and optical element

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Embodiment Construction

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] The invention provides an optical glass, comprising the following components:

[0034] 28wt%~43wt% SiO 2 ;

[0035] 23wt%~33wt% TiO 2 ;

[0036] 6wt% ~ 20wt% BaO;

[0037] 6wt% ~ 20wt% R 2 O;

[0038] The R 2 O includes K 2 O and / or Na 2 O;

[0039] The optical glass does not contain a clarifying agent.

[0040] SiO 2 It is an important glass-forming body oxide, which forms an irregular continuous network with the structural unit of silicon-oxygen tetrahedron, and is the skeleton of optical glass. SiO 2 It has the fu...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C03C3/062C03C3/078G02B1/00
Inventor 孙伟
Owner CDGM OPTICAL GLASS