Optical glass, glass preform, optical element and optical instrument

A technology of glass prefabrication and optical glass, which is applied in the direction of optical components, optics, instruments, etc., and can solve problems such as the difficulty of correcting lens temperature drift

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

However, although the reliability of the fixed-focus lens is very good, its fatal weakness is ...

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

[0107]

[0108] In order to further clearly illustrate and illustrate the technical solution of the present invention, the following non-limiting examples are provided.

[0109] 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.

[0110] Table 1

[0111]

[0112]

[0113] Table 2

[0114]

[0115]

[0116]

[0117] 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, 0.1-1.5% of WO3/ZnO, more than 0.5% of WO3/Nb2O5, 0.25-1.3% of ZnO/La2O3, 0.45-2.75% of ZnO/B2O3, 0.1-1.0% of WO3/(SiO2+B2O3), 5-40% of Nb2O5+TiO2+WO3, and 0.5-1.0% of La2O3/(La2O3+Gd2O3+Y2O3). According to the present invention, through the reasonable component design, the obtained optical glass has a large positive refractive index temperature coefficient 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 1.74-1.86 and an Abbe number of 35-48, 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 1.74-1.86 and an Abbe number of 35-48 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): C03C3/068C03C4/00G02B1/00
Inventor 袁伟何波
Owner CDGM OPTICAL GLASS
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