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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 problem of difficult correction of lens temperature drift and achieve the effect of low temperature coefficient of refraction index

Active Publication Date: 2022-04-15
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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

[0092]

[0093] In order to further clearly illustrate and illustrate the technical solution of the present invention, the following non-limiting examples are provided.

[0094] 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.

[0095] Table 1.

[0096]

[0097]

[0098] Table 2.

[0099]

[0100]

[0101]

[0102] 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 l...

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PUM

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Abstract

The present invention provides an optical glass, the components of the optical glass are expressed in weight percentage, and contain: B 2 O 3 : 10~30%; SiO 2 : 0~10%; Ln 2 O 3 : 20~40%; BaO: 21~38%; WO 3 +Nb 2 O 5 +TiO 2 : 5~25%; ZrO 2 : greater than 0% but less than or equal to 10%; ZnO: greater than 0% but less than or equal to 9.5%, where (WO 3 +Nb 2 O 5 +TiO 2 ) / BaO is 0.2~1.0, BaO / Ln 2 O 3 is 0.6 to 1.5, the Ln 2 O 3 for La 2 O 3 , Gd 2 O 3 , Y 2 O 3 one or more of. Through reasonable component design and component distribution ratio, the optical glass of the present invention can obtain the desired refractive index and Abbe number, and at the same time have a relatively low temperature coefficient of refractive index.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with a relatively low temperature coefficient of refraction index, as well as a glass preform, an optical element and an optical instrument made of the optical glass. Background technique [0002] 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 vehicle-mounted lens to meet the harsh working environment is to keep the structure as simple as possible. The more complex the structure, the worse the reliability. T...

Claims

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Application Information

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