Optical glass, glass prefabticated member, optical element and optical instrument

A technology of glass prefabrication and optical glass, which is applied in optical components, optics, instruments, etc. It can solve the problems of increasing energy consumption in the molding process and shortening the service life of molds, and achieves improved glass chemical stability, low transition temperature, and excellent chemical properties. The effect of stability

Pending Publication Date: 2019-01-22
CDGM OPTICAL GLASS
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  • Application Information

AI Technical Summary

Problems solved by technology

The minimum transition temperature published in the examples is 572°C, too high a transition temperature will shorten the service life of the mold and increase the energy consumption of the molding process

Method used

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  • Optical glass, glass prefabticated member, optical element and optical instrument
  • Optical glass, glass prefabticated member, optical element and optical instrument
  • Optical glass, glass prefabticated member, optical element and optical instrument

Examples

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Effect test

Embodiment Construction

[0023] Ⅰ. Optical glass

[0024] Next, the composition range of each component of the optical glass of this invention is demonstrated. In this specification, unless otherwise specified, the content of each component is expressed in weight percent relative to the total amount of glass substances converted into oxides. Here, the "composition in terms of oxides" refers to the case where oxides, composite salts, hydroxides, etc. used as raw materials for the optical glass composition of the present invention are decomposed and converted into oxides during melting , and the total amount of the oxide was taken as 100%.

[0025] Unless otherwise indicated in a specific instance, the numerical ranges set forth herein include the upper and lower values, "above" and "below" include the endpoints, all integers and fractions within the range, and are not intended to be limiting when the range is defined specific values ​​listed. The term "and / or" herein is inclusive, for example, "A an...

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PUM

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Abstract

The invention provides optical glass, wherein the range of the refractive index nd of the optical glass is 1.55 to 1.65; the range of the abbe number vd of the optical glass is 56 to 65; and the optical glass is prepared from the following components in percentage by weight: 20% to 45% of SiO2, 20% to 50% of B2O3, 0% to 10% of Al2O3, 0% to 10% of La2O3, 10% to 30% BaO, 2% to 15% of ZnO and 2% to 12% of Li2O. According to the optical glass, the glass transition temperature is lowered through optimizing the contents of alkaline earth metal oxides and a network former and regulating the contentsof the Li2O and the B2O3; the chemical stability of the glass is promoted by introducing the Al2O3 and the ZnO in a proper proportion; and precision mold pressing optical glass with excellent chemicalstability and the low transition temperature is obtained.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with a refractive index of 1.55-1.65 and an Abbe number of 56-65, a glass preform, an optical element and an optical instrument made thereof. Background technique [0002] With the development of the optoelectronic industry, the requirements for miniaturization, light weight and high performance of optical components are put forward, which makes the demand for aspheric lenses that can improve the imaging quality more and more. Aspherical lenses are mostly made by precision molding method, which is to place the glass material in a special mold and heat it to 10 5 ~10 9 Under the temperature condition of about dPa·s, the surface structure of the mold is transferred to the glass material by means of pressure, so as to obtain the aspheric lens with the expected surface parameters. The mold used in this method is made of superhard alloy material, which requires extremely high sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/066C03C3/068C03C3/089G02B1/00
CPCG02B1/00C03C3/066C03C3/068C03C3/089
Inventor 郝良振孙伟匡波
Owner CDGM OPTICAL GLASS
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