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Optical glass, glass prefabricated member or optical component prepared therefrom, and optical instrument

A technology of optical glass and optical components, applied in optical components, optics, instruments, etc., can solve the problems of high cost, easy devitrification of glass, and high difficulty in mass production, and achieve low production cost, devitrification resistance, and easy mass production Effect

Inactive Publication Date: 2018-12-11
CDGM OPTICAL GLASS
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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 problems in the prior art that the high-refraction and low-dispersion optical glass is easy to devitrify, the difficulty of mass production is high, and the cost is high. higher technical issues

Method used

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  • Optical glass, glass prefabricated member or optical component prepared therefrom, and optical instrument
  • Optical glass, glass prefabricated member or optical component prepared therefrom, and optical instrument
  • Optical glass, glass prefabricated member or optical component prepared therefrom, and optical instrument

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Embodiment

[0052] Examples of Optical Glass

[0053] In order to obtain glasses with the compositions shown in Tables 1 to 6, carbonates, nitrates, hydroxides, oxides, boric acid, etc. are used as raw materials, and the raw materials corresponding to the optical glass components are weighed in proportion to each raw material, After being fully mixed, it becomes a blending raw material, which 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 After pouring into a preheated mold and keeping it at 650-700°C for 2-4 hours, slow cooling is performed to obtain optical glass. Moreover, the characteristic of each glass was measured by the method shown below, and the measurement result is shown in Table 1-Table 6.

[0054] (1) Crystallization upper limit temperature

[0055] The crystallization performance of the glass is measured by the temperature gradient furnace method. The gla...

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Abstract

The invention discloses optical glass, a glass prefabricated member or an optical component prepared therefrom, and an optical instrument. The optical glass comprises (calculated by oxides) in percentage by mass: B2O3: 5 to 25%, Nb2O5: 2 to 15%, SiO2: 0.5 to 15%, ZrO2: 1 to 15%, TiO2: 0.5 to 10%, and the total of La2O3, Gd2O3, Y2O3, and Yb2O3: 50-75%, wherein Ta2O5 is not contained and the weightratio of La2O3 / Gd2O3 is 1.28 to 1.625. The optical glass has excellent performance without using Ta2O5, by applying the technical solution of the present invention, and strictly controlling the composition and content of the optical glass and the amount ratio among the specific components.

Description

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

Claims

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Application Information

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IPC IPC(8): C03C3/068C03C4/00G02B1/00
CPCC03C3/068C03C4/00G02B1/00
Inventor 孙伟
Owner CDGM OPTICAL GLASS
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