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Lanthanum flint optical glass and preparation method thereof

A technology of optical glass and flint, which is applied in the field of lanthanum flint optical glass and its preparation, can solve problems such as no cost advantage, and achieve the effects of good crystallization performance, excellent chemical stability, and easy mass production

Active Publication Date: 2013-11-20
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It contains 15-30% Gd 2 o 3 , 1~6% Ta 2 o 5 , 0.1~2%Li 2 O, the introduction of a large number of expensive raw materials into the glass has no cost advantage

Method used

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  • Lanthanum flint optical glass and preparation method thereof
  • Lanthanum flint optical glass and preparation method thereof
  • Lanthanum flint optical glass and preparation method thereof

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Embodiment

[0042] Examples 1 to 14 listed in the following Table 1 and Table 2 are used to illustrate the present invention to obtain lanthanum flint optics with a refractive index (nd) between 1.75 and 1.80 and an Abbe number (υd) between 44 and 51. Specific embodiments of glass. Comparative Examples A, B and C are comparative embodiments having a refractive index between 1.75-1.80 and an Abbe number between 44-51.

[0043] Calculate, weigh, and mix these raw materials in a V-shaped mixer according to the ratios provided in Table 1, and mix for 13-20 minutes at 10-20 revolutions per minute. Mix the prepared batches evenly and put them into the smelting device within 8 hours (in view of the application requirements of the present invention, the smelting device needs to use a platinum crucible), and then take appropriate stirring, clarification, and homogenization at 1250 ° C ~ 1350 ° C, And in the process of glass melting, dry air with a dew point not higher than -40°C needs to be intro...

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Abstract

The invention provides lanthanum flint optical glass which takes Si2O, B2O3 and La2O3 as main components and a preparation method thereof. The lanthanum flint optical glass is free of thorium, cadmium and arsenic. The refractivity of the optical glass is 1.75-1.80, the Abbe number is 45-51, and the optical glass has excellent chemical stability. The optical glass comprises the following compounds in percentage by mass: 5.6-10% of SiO2, 25-35% of B2O3, 40-50% of La2O3, more than 8% and less than 12% of Y2O3, 5-10% of ZrO2, 0-3% of ZnO, 0-3% of Nb2O5, 0-1% of Sb2O3, 30-44% of Sigma(SiO2+B2O3) and 45-60% of Sigma(La2O3+Y2O3). The optical glass is free of Ta2O5, Gd2O3, Yb2O3, TiO2, Li2O, PbO, WO3 and BaO. The optical glass has low cost, low specific gravity and high internal transmittance, thus having great market competition advantages.

Description

technical field [0001] The invention relates to a lanthanum flint optical glass, in particular to a lanthanum flint optical glass with a refractive index (nd) between 1.75 and 1.80 and an Abbe number (υd) between 45 and 51 and a preparation method thereof. The glass has high refraction, low dispersion, light weight, high internal transmittance, stable crystallization performance, and is suitable for mass production and processing of optical glass. Background technique [0002] In recent years, in order to meet the high-pixel, small and light requirements of high-end digital products, and in line with the current trend of pursuing compact and lightweight design, lightweight lenses are also required in the lenses used to construct optical systems. [0003] For these reasons, there has been a strong demand for optical glasses having high refraction, low dispersion properties, light weight, and stable devitrification properties in consideration of practicality in optical design....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068C03C4/00
Inventor 黄国雅胡向平梁立新张卫
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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