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

A technology of optical glass and optical components, applied in optical components, instruments, optics, etc., can solve the problems of high cost, high refraction and low dispersion optical glass easy to devitrify and high difficulty in mass production, and achieve the effect of excellent performance

Active Publication Date: 2020-02-25
CDGM OPTICAL GLASS
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Problems solved by technology

[0004] The purpose of the present invention is to provide an optical glass, a glass preform or an optical element and an optical instrument prepared therefrom, so as to solve the problem of high difficulty in mass production and high cost of high-refraction and low-dispersion optical glass in the prior art. question

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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Embodiment

[0059] Examples of Optical Glass

[0060] 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.

[0061] (1) Crystallization upper limit temperature

[0062] 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 optical element prepared from the optical glass, and an optical instrument. The optical glass comprises, based on the total massin terms of oxides, 5-25% of B2O3, 25-45% of La2O3, 15-35% of Gd2O3, 0-10% of Yb2O3, 2-15% of Nb2O5, 0.5-15% of SiO2, 1-15% of ZrO2, 0.5-10% of TiO2, 0-10% of Y2O3 and 0-10% of WO3, and does not contain Ta2O5, and the weight ratio of Nb2O5 to SiO2, namely Nb2O5 / SiO2, is 0.75 to 2. By strictly controlling the components and contents of the optical glass and the dosage ratio of the specific components, the optical glass still has excellent performance under the condition that Ta2O5 is not used.

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 combination of a lens formed of high refractive index low dispersion optical glass and a lens formed of high refractive index high dispersion optical glass can correct chromatic aberration and miniaturize the optical system, especially when the refractive index nd is greater than 1.87 and the Abbe number High refractive index and low dispersion optical glass with vd greater than 38.0, the market demand is increasing day by day. [0003] In order to meet the above-ment...

Claims

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Application Information

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