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Optical glass

An optical glass and glass technology, applied in optics, optical components, instruments, etc., can solve the problems of unfavorable competitiveness, poor water resistance, poor chemical stability, etc., and achieve the effects of good chemical stability, excellent crystallization performance and low cost.

Active Publication Date: 2018-02-06
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The optical glass disclosed by CN101389574A contains 30-40% B 2 o 3 , which has poor chemical stability, especially poor water resistance
CN1198414A discloses rare earth-containing optical glass close to the above optical constant range, but it contains 31-50% Nb 2 o 5 , which greatly increases the cost of raw materials, which is not conducive to improving the competitiveness of products

Method used

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  • Optical glass
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Experimental program
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Effect test

Embodiment

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

[0097]Melting and molding methods for producing optical glass can employ techniques known to those skilled in the art. Glass raw materials (carbonates, nitrates, sulfates, hydroxides, oxides, boric acid, etc.) are weighed and mixed according to the ratio of glass oxides, and then put into a melting device (such as a platinum crucible), and then After proper stirring, clarification, and homogenization at 1150-1400°C, the temperature is lowered to below 1250°C, poured or leaked into the molding mold, and finally annealed, processed and other post-processing, or directly pressed into shape by precision molding technology.

[0098] [Optical glass example]

[0099] The characteristics of each glass of the present invention were measured by the method shown below, and the measurement results are shown in Tables 1 to 3,

[0100] (1)...

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Abstract

The invention provides environment-friendly optical glass with relatively low cost, good chemical stability, the refractive index of 1.60-1.70 and the abbe number of 40-50. The optical glass containsthe following components in percentage by weight: 20-50% of SiO2, 0-15% of B2O3, 1-15% of TiO2, 2-20% of ZnO and 15-50% of BaO. According to the optical glass, under the premise that Nb2O5 is reducedand even is not contained, contents of alkali metals, alkaline earth metals, ZnO and TiO2 are optimized, glass with low cost, good chemical stability and excellent crystallization property is obtained, the glass can be widely applied to the fields of imaging, projection, telecommunication, optical communication engineering and laser technology application, and requirements of the modern novel photoelectric product can be met.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with a refractive index (nd) of 1.60-1.70 and an Abbe number (vd) of 40-50, and optical preforms and optical elements made of the optical glass and optical instruments. Background technique [0002] In recent years, optical glass with a refractive index (nd) of 1.60-1.70 and an Abbe number (vd) of 40-50 has been widely used in imaging, projection, telecommunication, optical communication engineering and laser technology applications, but currently There are still many problems with quasi-optical glass. [0003] Optical glass needs to have good chemical stability in order to improve the yield rate in the later processing and coating process. At present, most of these glasses use borate system as the basis, and then add a certain amount of rare earth oxides, alkali metal oxides and alkaline earth metal oxides. When such glass system B 2 o 3 When the content is large, the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/066C03C3/089C03C3/062C03C4/00G02B1/00
CPCC03C3/062C03C3/066C03C3/089C03C4/00G02B1/002
Inventor 李丹
Owner CDGM OPTICAL GLASS
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