Optical glass, glass preforms, optical components and optical instruments

A technology of optical glass and weight percentage, which is applied in optical components, instruments, optics, etc., can solve the problems such as the difficulty of correcting the temperature drift of the lens, and achieve the effect of a large positive temperature coefficient of refraction index

Active Publication Date: 2022-01-25
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 that it is very difficult to correct the temperature drift of the lens when it is applied in the car.

Method used

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  • Optical glass, glass preforms, optical components and optical instruments
  • Optical glass, glass preforms, optical components and optical instruments
  • Optical glass, glass preforms, optical components and optical instruments

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 whose components are represented by weight percentage, WO 3 / ZnO is 0.1~1.5; WO 3 / Nb 2 o 5 Above 0.5; ZnO / La 2 o 3 0.25~1.3; ZnO / B 2 o 3 0.45-2.75; WO 3 / (SiO 2 +B 2 o 3 ) is 0.1~1.0; Nb 2 o 5 +TiO 2 +WO 3 : 5~40%; La 2 o 3 / (La 2 o 3 +Gd 2 o 3 +Y 2 o 3 ) ranges from 0.5 to 1.0. Through reasonable component design, in the case of obtaining the desired optical properties such as refractive index and Abbe number, the obtained optical glass has a large positive refractive index temperature coefficient.

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 those exposed outside the vehicle body, which need 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 vehicl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/068C03C4/00G02B1/00
Inventor 袁伟何波
Owner CDGM OPTICAL GLASS
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