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Optical glass free of clarifying agent and optical element

A technology for optical glass and optical components, applied in the field of optical glass and optical components, can solve the problems of increasing nitrogen oxide emissions, adverse environmental effects of clarifying agents, etc.

Inactive Publication Date: 2015-03-25
LIUZHOU CHUANGYU TECH
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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 free of clarifying agent and optical element
  • Optical glass free of clarifying agent and optical element

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Embodiment Construction

[0036] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0037] The embodiment of the present invention discloses an optical glass without clarifier, which comprises the following components:

[0038] 22wt%~30wt% SiO 2 ;

[0039] 22wt%~28wt% of B 2 o 3 ;

[0040] 6wt% ~ 12wt% BaO;

[0041] 8wt% ~ 12wt% CaO;

[0042] 5wt% ~ 10wt% MgO;

[0043] 5wt% ~ 8wt% ZnO;

[0044] 2wt%~5wt% Nb 2 o 5 ;

[0045] 4wt% ~ 6wt% K 2 O;

[0046] 2wt%~5wt% La 2 o 3 ;

[0047] The optical glass does not contain a clarifying agent.

[0048] SiO 2 It is an important glass-forming body oxide, which forms an irregular continuous network with the structural unit of silicon-oxygen tetrahedron...

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Abstract

The invention provides optical glass free of a clarifying agent and an optical element. The optical glass free of the clarifying agent is prepared from the following components: 22wt%-30wt% of SiO2, 22wt%-28wt% of B2O3, 6wt%-12wt% of BaO, 8wt%-12wt% of CaO, 5wt%-10wt% of MgO, 5wt%-8wt% of ZnO, 2wt%-5wt% of Nb2O5, 4wt%-6wt% of K2O, 2wt%-5wt% of La2O3; the optical glass is free of clarifying agent. According to the experimental results, the optical glass provided by the invention is free of the clarifying agent and non-environment-friendly elements, the refractive index is 1.66-1.69, the abbe number is 44-47, the corresponding wavelength is smaller than 370 nm when the transmittance is up to 80%, and the needs on modern image-forming equipment are met.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to an optical glass and an optical element without clarifying agent. Background technique [0002] Optical glass is an inorganic glass that transmits light by refraction, reflection, and transmission, or changes the intensity or spectral distribution of light by absorption, and is used to manufacture lenses, prisms, mirrors, and windows in optical instruments or mechanical systems. . Optical glass has good light transmission performance and high refractive index, and is widely used in the manufacture of optical instruments such as spectacle lenses, cameras, telescopes, microscopes and lenses. [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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068
Inventor 陈帆
Owner LIUZHOU CHUANGYU TECH
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