High-refraction high-dispersion optical glass

An optical glass, high dispersion technology, used in optics, optical components, instruments, etc., can solve problems such as poor thermal shock resistance, reduced glass yield, and cracking

Active Publication Date: 2019-10-18
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] CN101636359A discloses an optical glass with a refractive index of 1.70-1.89 and an Abbe number of 20-30, which has poor devitrification resistance and is easy to devitrify during production or thermal processing
Due to the large thermal expansion coefficient of optical glass, it is easy to cause cracks during processing, which reduces the yield of glass; at the same time, its thermal shock resistance is also poor.

Method used

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  • High-refraction high-dispersion optical glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0109]

[0110] In order to further clearly illustrate and illustrate the technical solution of the present invention, the following non-limiting examples are provided.

[0111] In this example, the optical glass having the composition shown in Table 1 to Table 2 was obtained by using the above-mentioned manufacturing method of optical glass. In addition, the properties of each glass were measured by the test method described in the present invention, and the measurement results are shown in Tables 1 to 2.

[0112] Table 1

[0113]

[0114]

[0115] Table 2

[0116]

[0117]

[0118]

[0119] The glasses obtained in Examples 1 to 20 of the optical glass are used, for example, by means of grinding, or hot press molding, precision stamping, and other compression molding methods to produce concave meniscus lenses, convex meniscus lenses, and double-convex lenses. , biconcave lens, plano-convex lens, plano-concave lens and other prefabricated parts of various len...

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Abstract

The invention provides high-refraction and high-dispersion optical glass. The optical glass comprises the following components in percentage by weight: 25-40% of SiO2, 20-38% of TiO2, 3-20% of Na2O, 3-20% of BaO and 5-20% of Nb2O5, wherein the ratio of SiO2/(BaO+Nb2O5) is 0.75-3.0. Through reasonable component design and proportion, the optical glass provided by the invention has a low thermal expansion coefficient and excellent devitrification resistance and meets the requirements of the photoelectric field while meeting the expected refractive index and Abbe number.

Description

technical field [0001] The invention relates to an optical glass, in particular to a high-refraction and high-dispersion optical glass with a refractive index of 1.73-1.82 and an Abbe number of 21-29. Background technique [0002] In recent years, optical components and optical instruments have developed rapidly in terms of digitalization, integration and high precision, which put forward higher requirements for the performance of optical glass used in optical instruments and optical components of equipment. Optical glass with a refractive index of 1.73-1.82 and an Abbe number of 21-29 belongs to high-refraction and high-dispersion optical glass, which can be used in conjunction with high-refraction and low-dispersion optical glass, so it is widely used. [0003] CN101636359A discloses an optical glass with a refractive index of 1.70-1.89 and an Abbe number of 20-30, which has poor resistance to devitrification and is prone to devitrification during production or thermal pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068C03C3/062C03C4/00G02B1/00
CPCC03C3/062C03C3/068C03C4/00G02B1/00
Inventor 孙伟
Owner CDGM OPTICAL GLASS
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