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Optical glass, glass preform, optical element and optical instrument

A technology of optical glass and weight percentage, which is applied in the field of glass prefabricated parts, optical components and optical instruments, and can solve the problems of unusable optical components, poor anti-devitrification performance, and easy precipitation of crystals, etc.

Active Publication Date: 2019-05-07
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the anti-crystallization performance of optical glass is not good, it is easy to precipitate crystals during the production process, resulting in the waste of glass, especially in the second pressing process, crystallization will cause the optical components formed by pressing to be unusable, resulting in cost and energy losses. waste

Method used

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  • Optical glass, glass preform, optical element and optical instrument
  • Optical glass, glass preform, optical element and optical instrument
  • Optical glass, glass preform, optical element and optical instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0115]

[0116] In order to further clearly illustrate and illustrate the technical solution of the present invention, the following non-limiting examples are provided.

[0117] 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.

[0118] Table 1

[0119]

[0120]

[0121] Table 2

[0122]

[0123]

[0124]

[0125] 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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PUM

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Abstract

The invention provides an optical glass, which comprises, by weight, 0-20% of SiO2, 10-30% of B2O3, 20-50% of La2O3, 0-15% of Gd2O3, 0-15% of Y2O3, 12-30% of ZnO, 4-20% of WO3, 0-15% of Nb2O5, and 0-10% of ZrO2, wherein WO3 / ZnO is 0.15-1.5. According to the present invention, through the reasonable component design, the obtained optical glass has a large positive refractive index temperature coefficient and excellent anti-crystallization property in the case of the obtaining of desired refractive index, desired Abbe number and other desired optical performances.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with a refractive index of 1.75-1.85 and an Abbe number of 37-47, as well as glass preforms, optical elements and optical instruments made of the optical glass. Background technique [0002] In the prior art, glass with a refractive index of 1.75-1.85 and an Abbe number of 37-47 belongs to high refractive index glass, and is widely used in various lenses. In recent years, vehicle-mounted lens equipment has developed vigorously. Compared with general photography and other applications, the quality of vehicle-mounted lenses is closely related to safety. Therefore, vehicle-mounted lenses place more emphasis on the reliability of equipment, especially when exposed outside the vehicle body, it needs to withstand harsh conditions. Working environment, such as reversing camera, front-view camera, rear-view mirror auxiliary camera, etc. [0003] The principle of designing a vehicle-m...

Claims

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Application Information

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IPC IPC(8): C03C3/068
Inventor 袁伟何波
Owner CDGM OPTICAL GLASS
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