Optical glass, glass prefabricated member or optical element prepared from the optical glass, and optical instrument

A technology for optical glass and optical components, applied in optical components, instruments, optics, etc., can solve the problem of high-refractive and low-dispersion optical glass being easily devitrified and difficult to mass-produce, and achieve the effect of devitrification resistance and easy mass production.

Active Publication Date: 2020-02-25
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide an optical glass, a glass preform or an optical element and an optical instrument prepared therefrom, so as to solve the technical problem that high-refraction and low-dispersion optical glass is easy to devitrify and difficult to mass-produce in the prior art

Method used

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  • Optical glass, glass prefabricated member or optical element prepared from the optical glass, and optical instrument
  • Optical glass, glass prefabricated member or optical element prepared from the optical glass, and optical instrument
  • Optical glass, glass prefabricated member or optical element prepared from the optical glass, and optical instrument

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Experimental program
Comparison scheme
Effect test

Embodiment

[0051] Optical glass embodiment

[0052] In order to obtain glass having the composition shown in Tables 1 to 6, carbonate, nitrate, hydroxide, oxide, boric acid, etc. are used as raw materials, and the raw materials corresponding to the optical glass components are weighed in proportions. After being thoroughly mixed, it becomes a blended raw material. The blended raw material is put into a platinum crucible, heated to 1200~1450°C, melted, stirred, and clarified to form a uniform molten glass, and then the molten glass is moderately cooled before pouring Into a preheated mold and hold at 650 to 700°C for 2 to 4 hours, then slowly cool to obtain an optical glass. In addition, the characteristics of each glass were measured by the methods shown below, and the measurement results are shown in Tables 1 to 6.

[0053] (1) The upper limit temperature of crystallization

[0054] The crystallization performance of the glass was measured by the temperature gradient furnace method. The glas...

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PUM

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Abstract

The invention discloses optical glass, a glass prefabricated member or an optical element prepared from the optical glass and an optical instrument. The optical glass comprises, based on the total mass in terms of oxides, 5-25% of B2O3, 2-15% of Nb2O5, 0.5-15% of SiO2, 1-15% of ZrO2, 0-10% of TiO2, 0-10% of Ta2O5, and La2O3, Gd2O3, Y2O3 and Yb2O3 in a total amount of 50-75%, wherein the weight ratio of La2O3 to Gd2O3, namely La2O3/Gd2O3, is 1.28 to 1.625. By applying the technical scheme provided by the invention, the optical glass provided by the invention has excellent performance by strictly controlling the components and content of the optical glass and the dosage ratio of the specific components.

Description

Technical field [0001] The present invention relates to the technical field of optical glass, in particular to an optical glass, a glass preform or optical element and optical instrument prepared therefrom. Background technique [0002] At present, with the development of digital camera equipment, camera equipment and projection equipment, the requirements for optical components are higher, which requires the development and production of higher performance optical glass. Among them, the combination of a lens formed of high refractive index and low dispersion optical glass and a lens formed of high refractive index and high dispersion optical glass can correct chromatic aberration and make the optical system compact, especially the refractive index nd is greater than 1.87 and the Abbe number vd is greater than 38.0 high refractive index and low dispersion optical glass, the market demand is increasing. [0003] In order to meet the above-mentioned light index, the basic formula sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068C03C4/00G02B1/00
CPCC03C3/068C03C4/00G02B1/00
Inventor 孙伟
Owner CDGM OPTICAL GLASS
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