Optical glass, glass preform, optical element and optical instrument

A technology of glass prefabrication and optical glass, which is applied in optical components, instruments, optics, etc. It can solve the problems of poor devitrification resistance, unusable optical components, crystallization, etc., and achieve the effect of excellent devitrification resistance

Pending Publication Date: 2019-09-06
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the devitrification resistance of optical glass is poor, problems such as crystallization will easily occur during the production process, which will lead to devitrification of the glass and make the glass waste, especially the devitrification during the secondary pressing process will lead to the optical components formed by pressing Can not be used, resulting in waste of cost and energy

Method used

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

Examples

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Embodiment

[0094]

[0095] In order to further clearly illustrate and illustrate the technical solutions of the present invention, the following non-limiting examples are provided.

[0096] 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 glass. In addition, the characteristics of each glass are measured by the test method described in the present invention, and the measurement results are shown in Tables 1 to 2, wherein K1 represents SiO 2 / B 2 o 3 , with K2 representing SiO 2 / La 2 o 3 , with K3 representing SiO 2 / (La 2 o 3 +B 2 o 3 ), represented by K4 (BaO+SiO 2 ) / (La 2 o 3 +B 2 o 3 ), use K5 to represent B 2 o 3 / La 2 o 3, represented by K6 (BaO+SiO 2 ) / (Li 2 O+Na 2 O+B 2 o 3 ), represented by K7 (Nb 2 o 5 +ZrO 2 ) / (Li 2 O+Na 2 O+BaO), use K8 to represent Nb 2 o 5 / SiO 2 .

[0097] Table 1

[0098]

[0099]

[0100] Table 2

[0101]

[...

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PUM

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Abstract

The invention provides an optical glass. The optical glass comprises 32-49 wt% of SiO2, 2-12 wt% of B2O3, 2-12 wt% of La2O3, 20-28 wt% of Nb2O5, 1-8 wt% of ZrO2, 0.5-7 wt% of BaO, 0.5-8 wt% of Li2O and 5-20 wt% of Na2O, wherein a ratio of SiO2/B2O3 is 9.0 or less, a ratio of SiO2/La2O3 is 4.0-12.0, a ratio of B2O3/La2O3 is 0.5-2.0, a ratio of (BaO+SiO2)/(Li2O+Na2O+B2O3) is 1.0-3.0, and a ratio ofNb2O5/SiO2 is 0.3-1.5. The optical glass obtained by the reasonable component proportioning has the advantages of negative anomalous dispersion and excellent devitrification resistance.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with a refractive index of 1.62-1.72 and an Abbe number of 35-42. Background technique [0002] Optical glass is an indispensable and important part of optical instruments and optoelectronic products. In recent years, with the widespread popularity of optoelectronic products such as smartphones and SLR cameras, higher requirements have been put forward for the performance of optical glass, such as requiring optical glass It has the ability to eliminate or eliminate the residual chromatic aberration of the secondary spectrum as much as possible, which requires optical glass to have negative anomalous dispersion performance. [0003] During the production or secondary molding process of optical glass, the devitrification resistance of optical glass is highly required. If the devitrification resistance of optical glass is poor, problems such as crystallization will easily occur ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/097C03C3/068G02B1/00
CPCC03C3/097C03C3/068G02B1/00
Inventor 吴缙伟袁伟黄桃何波易池端侯瑞王宇鄢家富张仕东
Owner CDGM OPTICAL GLASS
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