High-refraction low-dispersion optical glass

A technology of optical glass and low dispersion, applied in the field of high-refraction and low-dispersion optical glass, can solve the problems of high dispersion and great environmental hazards, and achieve the effect of good process performance

Inactive Publication Date: 2004-12-29
CDGM OPTICAL GLASS
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Problems solved by technology

[0002] Glass with high refractive index generally has high dispersion. To manufacture optical glass with high refraction and low dispersion, in order to improve the process performance of glass, the traditional method is to add radioactive thorium oxide to this type of glass, which is very harmful to the environment. Large, with the strengthening of environmental awareness, thorium oxide is no longer suitable for this type of glass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] B 2 o 3 , SiO 2 is a glass former, B 2 o 3 As a glass former, it is the main component of high-refraction and low-dispersion glass. Through experiments, SiO 2 The weight percentage content of 0.5-5% is more reasonable, otherwise it is not easy to melt, B 2 o 3 It is more reasonable to have a weight percentage content in the range of 20-30%.

[0007] La 2 o 3 、Gd 2 o 3 Has high refractive index and lower dispersion, is used as the main component in the present invention, and with WO 3 and other components to adjust the optical constants, through the experiment La 2 o 3 The weight percentage content is 27~39%; Gd 2 o 3 The weight percentage content is 10-16%; WO 3 The weight percent content of 0.5~5% is more reasonable. ;

[0008] Ta 2 o 5 , Nb 2 o 5 It has a high refractive index and can replace thorium oxide to improve the process performance of glass and increase Ta 2 o 5 The proportion of glass can improve the process performance of glass, but d...

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Abstract

The present invention provides a high-refractive low-dispersion optical glass, and its raw material composition comprises (wt%) La2O3 27-39%, Ta2O5 10-15%, B2O3 20-30%, Gd2O3 10-16%, Nb2O5 0.5-5% and SiO2 0.5-5%. Said optical glass contains no harmful thorium oxide, not only its optical constant is in accord with requirements, but also its technological performance is good.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with high refraction and low dispersion. Background technique [0002] Glass with high refractive index generally has high dispersion. To manufacture optical glass with high refraction and low dispersion, in order to improve the process performance of glass, the traditional method is to add radioactive thorium oxide to this type of glass, which is very harmful to the environment. Large, with the strengthening of environmental awareness, thorium oxide is no longer suitable for this type of glass. Contents of the invention [0003] The object of the present invention is to provide a high refraction and low dispersion optical glass without thorium oxide. [0004] The technical solution of the present invention to solve the technical problem is: a kind of high refraction low dispersion optical glass, the weight percentage composition of its composition comprises: La 2 o 3 : 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/068C03C4/00
CPCC03C3/068
Inventor 袁俊鸿卢家金
Owner CDGM OPTICAL GLASS
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