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Optical Glass, Optical Components and Optical Instruments

An optical glass, weight percentage technology, applied in optical components, instruments, optics, etc., can solve the problems of poor anti-devitrification performance, high dispersion, difficult to apply high-precision optical instruments, etc., and achieve the effect of excellent performance and low dispersion.

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

AI Technical Summary

Problems solved by technology

In the prior art, the relative partial dispersion of optical glass within this range is relatively high and does not have anomalous dispersion, so it is difficult to meet the requirements of eliminating the residual chromatic aberration of the secondary spectrum. ~1.77, Abbe number is 39~41 optical glass
On the other hand, the current mainstream manufacturing method of glass preforms and optical components is secondary hot press molding. It is easy to produce crystals or opacification, and it is difficult to apply to high-precision optical instruments

Method used

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  • Optical Glass, Optical Components and Optical Instruments
  • Optical Glass, Optical Components and Optical Instruments
  • Optical Glass, Optical Components and Optical Instruments

Examples

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Comparison scheme
Effect test

Embodiment

[0116]

[0117] In order to further clearly illustrate and illustrate the technical solution of the present invention, the following non-limiting examples are provided.

[0118] In this example, the optical glass having the compositions shown in Table 1 to Table 5 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 5. In the anti-devitrification performance tests in Tables 1 to 5, according to the aforementioned test method, the glass without opacification and no crystal particles inside is marked as "A", and the glass without opacification but with 1 to 10 crystal particles inside is marked as "A". "B", no opacification but with 10 to 20 crystal particles in it is marked as "C", and the case with opacification or dense devitrification particles in it is marked as "×".

[0119] Table ...

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PUM

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Abstract

The invention provides an optical glass, the composition of the optical glass is represented by weight percentage, including: SiO 2 : 23~45%; Nb 2 o 5 : 20~40%; ZrO 2 : 2~14%; BaO: 2~18%; Li 2 O: 1~12%; La 2 o 3 : 0~14%, of which Nb 2 o 5 / (BaO+La 2 o 3 ) is 0.8 to 8.0. Through reasonable component design, the optical glass obtained by the present invention has relatively low relative partial dispersion, has negative anomalous dispersion, and has excellent anti-devitrification performance of the secondary pressure type, which meets the application of high-end optoelectronic products.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with a refractive index of 1.69-1.82 and an Abbe number of 32-40, and an optical element and an optical instrument made thereof. Background technique [0002] Optical glass is an important part of optoelectronic products. In recent years, with the rapid development of optoelectronic products such as smart phones, SLR cameras and surveillance security, higher requirements have been placed on the performance of optical glass. For example, in optical design, optical glass is expected to have the performance of eliminating or eliminating the residual chromatic aberration of the secondary spectrum as much as possible, which requires optical glass to have the desired refractive index, Abbe number and certain anomalous dispersion. [0003] Refractive index (n d ) at 1.69~1.82, Abbe number (ν d ) in the range of 32 to 40 belongs to the flint optical glass, which can be widely used i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/062G02B1/00
CPCC03C3/062G02B1/00
Inventor 匡波
Owner CDGM OPTICAL GLASS
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