Optical glass for precision molding

A kind of optical glass and glass technology, applied in the direction of optics, optical components, instruments, etc., can solve the problems of high volatilization of glass components, unsuitable optical glass, adhesion of mold surface, etc., and achieve low dispersion, low element volatilization and diffusion, and high refraction rate effect

Inactive Publication Date: 2013-05-08
SCHOTT GLASS TECH (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] JP1286934 discloses a low melting point glass, the disadvantages of these glasses are: easy to adhere to the surface of the mold, high degree of volatilization in the precision molding process
[0009] JP 60-221338 discloses a high-refractive-index optical glass used in a precision molding process, but since the devitrification temperature of the glass is higher than the temperature at which the glass is suitable for precision molding viscosity, the glass is not suitable for precision molding by using production of optical glass
In addition, the disadvantages of the glass are that it is easy to stick to the surface of the mold, and the glass components have a high volatility during the precision molding process.

Method used

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  • Optical glass for precision molding
  • Optical glass for precision molding
  • Optical glass for precision molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0061] Table 1 is an example of an embodiment within a preferred composition range, and the glass described in the example is prepared according to the following steps:

[0062] The raw materials used are commercially available conventional oxides, hydroxides, carbonates and nitrates, etc., all purchased from Sinopharm Chemical Reagent Co., Ltd. (Suzhou), chemical grade. After weighing and mixing according to the weight composition listed in the table, the mixture was put into a 500ml platinum crucible. Melting, clarifying and homogenizing in electric furnace at 1100-1400°C and cooling down. It can be obtained by casting molten glass into a metal mold preheated at 400°C, and then placing the glass and metal mold in an annealing furnace for annealing and cooling.

[0063]Table 1 shows the composition, refractive index, Abbe number and transition temperature of Examples 1-6, wherein the content is expressed in wt% based on oxide.

[0064] The glass sample was made into a 20×20...

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PUM

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Abstract

The present invention relates to precision molding optical glasses, having a refractive index ?d of 1.67 d d of 52.0 d < 55.0, and a glass transformation temperature T9 2, 5.5-15%; Li2O, 2.6-8%; B2O3, 20-40%; La2O3, 21.5-35%; Y2O3, 0.5-10%; Ta2O5, 0.1-8%; ZrO2, 0.1-5%; ZnO, 1-35%; SrO, 0-15%; BaO1 0-22%; AI2O3, 0-10%; Na2O1 0-2%; Sb2O3, 0-1 %; SnO2, 0-1 % and CeO2, 0-1 %.

Description

technical field [0001] The present invention generally relates to optical glass, and particularly, the present invention relates to optical glass suitable for precision molding, and more particularly, the present invention relates to precision molding optical glass having high refractive index, low dispersion and low glass transition temperature. At the same time, the glass has low volatilization of elements during the molding process and does not adhere to the mold material. Background technique [0002] In recent years, the products on the market in the field of optics and optoelectronics have tended to be more and more miniaturized. This has been demonstrated by the demand for ever smaller end products and the growing demand for miniaturization of individual components and components of such end products. For producers of optical glass, this development means that, in addition to an increase in the quality of the finished product, a reduction in the volume of the raw gla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068
CPCC03C3/068G02B5/00
Inventor 张广军乔斯·西默
Owner SCHOTT GLASS TECH (SUZHOU) CO LTD
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