High-refraction and high-dispersion optical glass

An optical glass, high dispersion technology, applied in optics, optical components, instruments, etc., can solve the problems of glass thermal shock resistance deterioration, large thermal expansion coefficient, cracking, etc., to achieve high refractive index and dispersion, low thermal expansion The effect of the coefficient

Active Publication Date: 2021-11-02
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large thermal expansion coefficient of optical glass, it is easy to cause cracks during processing, which reduces the yield of glass
On the other hand, the large thermal expansion coefficient leads to poor thermal shock resistance of glass, thus limiting the application of optical glass

Method used

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  • High-refraction and high-dispersion optical glass
  • High-refraction and high-dispersion optical glass
  • High-refraction and high-dispersion optical glass

Examples

Experimental program
Comparison scheme
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Embodiment

[0133]

[0134] In order to further clearly illustrate and illustrate the technical solution of the present invention, the following non-limiting examples are provided.

[0135] In this embodiment, the high-refraction and high-dispersion optical glass having the compositions shown in Table 1 to Table 3 was obtained by adopting the above-mentioned manufacturing method of high-refraction and high-dispersion 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 3. In the anti-devitrification performance test of the secondary pressure type in Table 1 to Table 3, according to the aforementioned test method, the glass with no opacification and no crystal particles on the surface and inside is recorded as "A", and the glass has no opacification and no devitrification inside However, there are crystal grains on the surface, which is recorded as "B" (the crysta...

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Abstract

The invention provides high-refraction and high-dispersion optical glass, which comprises the following components in percentage by weight: 11-30% of SiO2; 6-20% of Nb2O5; 15-35% of TiO2; 15-35% of BaO; 1-12% of CaO; and 1-10% of zrO2, Nb2O5 / BaO being 0.2-1.2. Through reasonable component design, the optical glass obtained by the invention has a relatively low thermal expansion coefficient while having relatively high refractive index and dispersion, and meets the application of high-performance photoelectric products.

Description

technical field [0001] The invention relates to an optical glass, in particular to a high-refraction and high-dispersion optical glass with a relatively low coefficient of thermal expansion. Background technique [0002] In recent years, with the development of optoelectronic information, digital display and other fields, the requirements for miniaturization, light weight and high performance of optical components used in optical systems have been put forward. High refraction and high dispersion optical glass can be coupled with low dispersion optical glass to effectively eliminate chromatic aberration and secondary spectrum. At the same time, it can effectively shorten the total optical length of the lens and miniaturize the imaging system. Therefore, this type of glass has a wide application prospect . Due to the large thermal expansion coefficient of optical glass, it is easy to cause cracks during processing, which reduces the yield of glass. On the other hand, a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/062C03C3/064C03C3/066C03C3/068C03C4/00G02B1/00
CPCC03C3/062C03C3/064C03C3/066C03C3/068C03C4/00G02B1/00
Inventor 匡波
Owner CDGM OPTICAL GLASS
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