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High Refractive Optical Glass

A kind of optical glass and glass technology, applied in optics, optical components, instruments, etc., can solve the problems of increasing the crystallization tendency, moving the absorption edge to the visible light region, reducing the refractive index, etc.

Active Publication Date: 2018-12-21
SCHOTT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But Pt introduced as particles or dissolved Pt may result in a shift of the absorption edge to the visible region and increased crystallization tendency (in the case of particles), especially when repressing the glass
[0011] In many cases, high levels of substances such as B 2 o 3 (DE 2756161, DE 10227494, JP2011-246337) and SiO 2 network formers, leading to an achievable refractive index n d reduction of
Additionally, in the case of certain combinations of rare earth metal oxides and conventional network formers, either the desired combination of transmission and optical position cannot be achieved, or the glass system has an even greater tendency to undergo crystallization, with the result that is an excessive reduction in yield and cannot produce glass economically

Method used

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Embodiment Construction

[0027] Unless otherwise stated, the expression "free of X" or "free of component X" used hereinafter means that the glass is substantially free of this component X, i.e. such components are present in the glass at most as impurities, But not added to the glass composition as a specific component. X can represent any component, such as F or MgO.

[0028] In the following, all proportions of glass components are given in % by weight based on oxides, unless stated otherwise.

[0029] The base glass system of the glasses of the present invention is lanthanum borosilicate, which forms a good basis for the desired properties.

[0030] The glass according to the invention contains lanthanum oxide in proportions of 40-60% by weight. The ratio should not fall below the lower limit, since otherwise the combination of high refractive index and high Abbe number cannot be achieved. It should not be higher than the upper limit, since otherwise the viscosity of the glass would increase to...

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Abstract

The invention relates to an optical glass with high refractivity and high transparency, and the preparation method for optical elements and the glass and the optical elements.

Description

technical field [0001] The invention relates to an optical glass with high refraction and high transparency, an optical element and a preparation method of the glass. Background technique [0002] In recent years, the market trend of both optical technology and optoelectronic technology (imaging, projection, electrical communication, optical communication engineering technology, mobile hard disk and application fields of laser technology) has been more and more towards the direction of miniaturization. This can be seen in smaller end products and demands the increasing miniaturization of individual components and parts of such end products. For this reason, high-refractive glasses, ie glasses with a greater refractive index, will be required in the future. Reducing the size of components or lens assemblies can be achieved by shortening the focal length of the lens using highly refractive glass. Furthermore, smaller radii of curvature of the lenses are possible, resulting i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/068C03C4/00
CPCC03C3/068G02B1/00
Inventor 西莫内.莫尼卡.里特卡尔.海涅曼比安卡·施罗德乌特.维于弗莫尼卡.吉尔克
Owner SCHOTT AG