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Optical glass and optical element

A technology for optical glass and optical components, applied in optical components, optics, instruments, etc., can solve the problems of chemical stability to be improved, the degree of coloring does not meet the requirements, and the refractive index cannot be satisfied, so as to improve chemical stability and improve mechanical properties. The effect of improving strength and transmittance

Active Publication Date: 2012-12-12
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the expected optical glass, its Abbe number range is too wide, and the coloring degree does not meet the requirements
[0006] None of the above-mentioned optical glasses can meet the requirement that the refractive index is 1.57-1.63, the Abbe number is 62-68, and the transmittance reaches 80%, the corresponding wavelength is less than 360nm, and the chemical stability needs to be improved.

Method used

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  • Optical glass and optical element
  • Optical glass and optical element
  • Optical glass and optical element

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] The preparation method of the optical glass provided by the present invention can be prepared according to methods well-known to those skilled in the art, such as: melting, clarifying, homogenizing, and cooling the raw materials to obtain optical glass, which is not particularly limited in the present invention .

[0060] The present invention also provides an optical element formed of the optical glass described in the above technical solution. The optical element of the present invention is formed from the above-mentioned optical glass of the present invention, and therefore, the optical element has various properties of the above-mentioned optical glass. The optical element of the invention has the characteristics that the refractive index is 1.57-1.63, the Abbe number is 62-68, and when the transmittance reaches 80%, the corresponding wavelength is less than 360nm. The optical element provided by the invention is suitable for digital cameras, digital video cameras,...

Embodiment 1

[0063] Prepare optical glass with the following composition:

[0064] P 2 o 5 : 40wt%, BaO: 42wt%, CaO: 8wt%, B 2 o 3 : 10wt%.

[0065] Its preparation process is as follows:

[0066] Mix the above-mentioned raw materials according to the proportion and put them into the platinum crucible, melt, clarify and uniform at 1000°C to 1250°C, and then cool down;

[0067] The molten glass is poured into the preheated metal casting mold, and then the metal mold is put into the annealing furnace for annealing to obtain optical glass.

[0068] To test the optical performance parameters of optical glass, the test standards are as follows:

[0069] The refractive index (nd) value is the annealed value of (-2°C / h)-(-6°C / h), and the refractive index and Abbe number are in accordance with "GB / T 7962.1-1987 Colorless Optical Glass Test Method Refractive Index and Dispersion Coefficient" test.

[0070] The glass is made into a sample with a thickness of 10mm±0.1mm, and the wavelength λ ...

Embodiment 2～13

[0090] The percentages of optical glass components and corresponding properties provided in Examples 2-13 are shown in Table 1, and the preparation methods are the same as those in Example 1.

[0091] The optical glass component percentages and corresponding properties provided by Table 1 Examples 2-13

[0092]

[0093]

[0094] The optical glass component percentages and corresponding properties provided by Table 1 Examples 2-13

[0095]

[0096]

[0097]It can be seen from the above examples that the optical glass provided by the embodiment of the present invention satisfies the refractive index of 1.57-1.63, the Abbe number of 62-68, and when the transmittance reaches 80%, the corresponding wavelength is less than 360nm, and it is resistant to the effect of humid atmosphere Stability and water resistance stability both reach level 1, with excellent chemical stability.

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Abstract

The invention provides optical glass which comprises 25wt%-45wt% of P2O5, 30wt%-45wt% of BaO, 1wt%-10wt% of CaO, 10wt%-20wt% of B2O3, 0wt%-10wt% of Na2O, 0wt%-10wt% of K2O, 0wt%-15wt% of SrO, 0wt%-5wt% of La2O3, 0wt%-0.5wt% of Sb2O3 and 0wt%-8wt% of Nb2O5. The invention also provides an optical element formed by the glass. The optical glass provided by the invention has good chemical stability, and the optical performance meets the requirement of the optical glass of which the corresponding wavelength is less than 360nm when the refractive index is 1.57-1.63, the Abbe number is 62-68 and the transmissivity reaches 80%.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to an optical glass and an optical element. Background technique [0002] Optical glass is an inorganic glass that transmits light by refraction, reflection, and transmission, or changes the intensity or spectral distribution of light by absorption, and is used to manufacture lenses, prisms, mirrors, and windows in optical instruments or mechanical systems. . Optical glass has good light transmission performance and high refractive index, and is widely used in the manufacture of optical instruments such as spectacle lenses, cameras, telescopes, microscopes and lenses. [0003] The optical properties of optical glass, such as refractive index, Abbe number and light transmittance are important indicators to determine whether it is suitable for use as optical components. In recent years, with the increasing popularity of digital cameras, digital video cameras, and camera phones, the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/19G02B1/00
Inventor 孙伟
Owner CDGM OPTICAL GLASS