High-refractivity and low-dispersion lanthanide optical glass NZLaF30 and method for manufacturing same

A high-refractive-index, optical glass technology, applied in the high-refractive-index and low-dispersion lanthanide optical glass NZLaF30 and its manufacturing field, can solve the problems of bubbles and streaks, affecting product quality, etc.

Inactive Publication Date: 2008-12-31
上海新沪玻璃有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are bubbles and streaks in the current heavy lanthanum flint optical glass, which affects the product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 4

[0014] The manufacture technique of example 4, metering component by weight is SiO 2 7.5, B 2 o 3 11.0, La 2 o 3 42.9、Ta 2 o 5 17.9, ZrO 2 5.9, Nb 2 o 5 0.90, Gd 2 o 3 13.9 Mix the components evenly and put them into a 300CC platinum crucible, heat and melt in a molybdenum wire rod electric furnace, keep the temperature at 1500°C for 4-5 hours, then lower it to 1360°C, pour it into a preheated iron mold, and put it into the Annealing is carried out in an annealing furnace heated by electric heating wire, kept at 690°C for 4 hours, cooled at 10°C / H to 350°C and turned off, and when it is close to room temperature, take out the glass, observe the quality of the glass, and then take samples to measure nd, nf-nc. At present, this brand can be put into 18 liter volume platinum crucible, smelted in a molybdenum rod heating electric furnace, and put into mass production.

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PUM

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Abstract

The invention discloses a high-refractive index low-dispersion lanthanide optical glass NZLaF30, wherein, based on weight percentage, the glass comprises 5.5-10.0 percent of SiO2, 9.5-12.5 percent of B2O3, 41.0-54.0 percent of La2O3, 4.0-7.5 percent of ZrO2, 0.5-5.0 percent of Nb2O5, 11.0-19.5 percent of Ta2O5, 0-15.0 percent of Gd2O3, 0-3.0 percent of Y2O3, 0-3.0 percent of ZnO, and 0-1.0 percent of TiO2. The high-refractive index low-dispersion lanthanide optical glass NZLaF30 has good crystallization and molding properties, and the optical constants (nd, vd) of the glass are in line with the standard requirements; the bubble of the glass reaches grade a; the glass has no stripes.

Description

technical field [0001] The present invention is a grade in the category of heavy lanthanum flint glass, and is used to manufacture high-refractive-index and low-dispersion lanthanide optical glass such as high-grade cameras and high-grade precision instruments. Background technique [0002] There are bubbles and streaks in the current heavy lanthanum flint optical glass, which affects the product quality. Contents of the invention [0003] The object of the present invention is to provide a kind of crystallization property, formability is good, optical constant (nd, vd), air bubble, striae meet standard requirement high refractive index and low dispersion lanthanide optical glass. [0004] The present invention is calculated by weight percentage, wherein SiO 2 -5.5-10.0, B 2 o 3 -9.5-12.5, La 2 o 3 -41.00-54.00, ZrO 2 -4.0-7.5, Nb 2 o 5 -0.5-5.0, Ta 2 o 5 -11.0-19.5, Gd 2 o 3 -0-15.0, Y 2 o 3 -0-3.0, ZnO-0-3.0, TiO 2 -0-1.0. [0005] The present invention i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068
Inventor 王佩珍翁泽安
Owner 上海新沪玻璃有限公司
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