Optical glass, optical preform and optical element

A technology for optical glass and optical components, applied in optical components, optics, instruments, etc., can solve the problems of lowering glass yield and poor anti-devitrification performance, achieve excellent anti-devitrification performance and chemical stability, and meet development needs Effect

Pending Publication Date: 2019-12-24
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current fluorophosphate optical glass with a refractive index above 1.53 and an Abbe number above 65 usually has poor crystallization resistance, and is easy to crystallize during production and precision molding, which reduces the yield of glass.

Method used

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  • Optical glass, optical preform and optical element
  • Optical glass, optical preform and optical element
  • Optical glass, optical preform and optical element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0096] The present invention is explained using the following examples, but the present invention should not be limited to these examples.

[0097] [Optical glass example]

[0098] The properties of the optical glass of the present invention were determined by the method shown above, and the components of the optical glass of the present invention and their properties are listed in Table 2-Table 9 in Examples 1-80.

[0099] Table 2

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[0102] table 3

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[0105] Table 4

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[0122] Table 9

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[0125] [Example of Glass Preform]

[0126] Cut the optical glass obtained in Examples 1-10 in Table 2 into a predetermined size, and then apply a release agent evenly on the surface, then heat and soften it, an...

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PUM

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Abstract

The invention provides optical glass with excellent crystallization resistance and chemical stability. The optical glass comprises the following components in percentage by mole of cations: 20-50% ofP<5+>, 5-25% of Al<3+>, 0-30% of Ln<3+> and 20-75% of R<2+>, wherein Ln<3+> is the total content of La<3+>, Gd<3+> and Y<3+>, and R<2+> is the total content of Ba<2+>, Sr<2+>, Ca<2+> and Mg<2+>; the anion contains F<-> and O<2->, wherein the molar ratio F<-> / (F<-> + O<2->) of the F<-> content to the total content ranges from 0.35 to 0.55. By reasonably adjusting the ratio of the components, the fluorophosphate optical glass disclosed by the invention has excellent crystallization resistance and chemical stability while having a refractive index of 1.53 or more and an Abbe number of 65 or more,and meets the development requirements of the modern photoelectric field.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with a refractive index above 1.53 and an Abbe number above 65, and an optical preform and an optical element formed from the optical glass. Background technique [0002] In optical systems such as cameras, in order to eliminate the chromatic aberration of the lens, the "achromatic" design of combining glasses with different Abbe numbers is usually adopted. Therefore, it is necessary to combine optical glasses with different refractive indices and Abbe numbers to form a reasonable optical lens. system. As a new type of glass material widely used, fluorophosphate optical glass has the characteristics of low dispersion. In the optical system, it can eliminate the special dispersion of the secondary spectrum, improve the resolution, and significantly improve the imaging quality of the optical system. At the same time, it has low softening temperature, it can be directly precisio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/247C03C4/00G02B1/00
CPCC03C3/247C03C4/00G02B1/00
Inventor 赖德光
Owner CDGM OPTICAL GLASS
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