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Fluorophosphate optical glass, its preparation method and optical element

A technology of fluorophosphate and optical glass, which is applied in optical components, optics, instruments, etc., can solve the problems of unfavorable elimination of matching, high cost, and unfavorable adjustment of nd, etc., and achieve excellent achromatic performance, low cost, and good The effect of chemical stability

Active Publication Date: 2020-09-04
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

But the cost of the two products is high, and it is not conducive to the adjustment of nd, υd matching and the elimination of air bubbles

Method used

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  • Fluorophosphate optical glass, its preparation method and optical element
  • Fluorophosphate optical glass, its preparation method and optical element

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preparation example Construction

[0065] The present invention also provides a method for preparing the fluorophosphate optical glass according to the present invention, which includes: weighing each component according to the proportion, mixing them uniformly, melting them, and then pouring or leaking them into a molding mold, or directly pressing forming.

[0066] Specifically, they are weighed according to the specified ratio, mixed into batch materials, and smelted in a crucible made of platinum at a temperature of 1050-1150°C. After the raw materials are melted into glass liquid, the temperature is raised to 1160-1260°C. ℃ and turn on the stirrer made of platinum to stir and homogenize, and the stirring time is controlled at 3-8h. After the stirring is completed, raise the temperature to 1220-1320°C and keep it warm for 4-9 hours to clarify and make the bubbles fully float up, then lower the temperature to 960-1060°C and pour or leak into the molding mold or press molding, and finally anneal After processi...

Embodiment 1～9

[0072] Calculate, weigh, and mix the components in the following Tables 1 and 2 according to the specified ratio, put them into a crucible made of platinum and melt at a temperature of 1100 ° C. During the melting process, O 2 To protect the surface of platinum from corrosion, after the raw materials are melted into molten glass, the temperature is raised to 1200°C and the stirrer made of platinum is turned on to stir and homogenize, and the stirring time is controlled at 5h. After the stirring is completed, raise the temperature to 1250°C and keep it warm for 6 hours to clarify and make the bubbles fully float up, then lower the temperature to 1000°C and pour or pour it into the forming mold, and add the above-mentioned cooling cover on the forming mold , leading the inert gas to the surface of the glass liquid through the cooling cover plate to solve the problem of volatilization streaks caused by the loss of fluorine. Finally, the optical glasses or optical elements of Exam...

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Abstract

The invention relates to fluorophosphate optical glass and a preparation method thereof and an optical element. The fluorophosphate optical glass comprises, by weight, 19 to 30% of P2O5, 11 to 18% ofAlF3, 1 to 6% of Al2O3, 46 to 62% of BaO, 1 to 6% of SrO, 1 to 8% of Na3AlF6, 0.1 to 3% of SnF4, 0 to 2% of B2O3 and 0.01 to 0.3% of Sb2O3, and the total weight ratio of the above components is more than 99%. The fluorophosphate optical glass has a refractive index nd of 1.56-1.62, Abbe number upsilon d of 67-71, good chemical stability, transmittance and degree of staining, has low specific gravity and low weight, has excellent achromatism, improves the imaging quality of the optical system, has a low crystallization temperature and can be easily produced massively.

Description

technical field [0001] The invention relates to a fluorophosphate optical glass, a preparation method thereof and an optical element, belonging to the field of optical glass. Background technique [0002] Glass materials with low refractive index and low dispersion have the characteristics of small refractive index change (scattering) depending on the wavelength of light, so their types are suitable for optical instruments with high-precision chromatic aberration. In the past, using the crystalline material CaF 2 , but due to the large size of CaF 2 Crystal production is more difficult and has the disadvantage of being difficult to process, so there is a tendency to replace it with fluorophosphate glass that has the same characteristics but has better chemical stability than crystal materials. [0003] Fluorophosphate glass is an optical material that combines the advantages of fluoride glass and phosphate glass. The most prominent feature is the tunability of optical prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/247G02B1/00
Inventor 霍金龙刘向东徐华峰杨爱清梁立新
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD