High refractive index optical glass, method for producing the same, and use thereof

By scientifically proportioning the optical glass components containing elements such as Si, B, La, and Zn, the problems of poor transmittance, high density, and high liquidus temperature of high-refractive-index optical glass have been solved, enabling low-cost and high-efficiency production of high-precision optical components suitable for optical imaging systems such as projection, monitoring, consumer electronics, and microscopes.

CN122212469APending Publication Date: 2026-06-16HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
Filing Date
2026-04-22
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing high-refractive-index optical glass suffers from problems such as poor transmittance, high density, and high liquidus temperature, which affect the processing accuracy and mass production efficiency of optical components.

Method used

Optical glass components with specific elemental molar percentage ratios, including Si, B, La, Zn, Ti, Zr, Nb, and Sb, are used. The refractive index nd is controlled to be 1.80~1.88, the Abbe number υd to be 30~40, the density to be less than 5 g/cm3, the liquidus temperature to be less than 950℃, and the glass is free of alkali metals, W, Al, P, F, Ca, Sr, Ba, Mg, Gd, Y, Yb, and Ta. The glass is smelted and shaped using a simple and easy preparation method.

Benefits of technology

It achieves high transmittance, low density, and low liquidus temperature, making it suitable for mass production of high-precision optical components. It is applicable to optical imaging systems such as projection, monitoring, consumer electronics, and microscopes, reducing production costs and energy consumption, and improving product qualification rate.

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Abstract

This invention provides a high refractive index optical glass, its preparation method, and its applications. The optical glass contains the following components by molar percentage: Si: 0~10%; B: 24.5~52%; La: 4.5~21%; Zn: 21.2~45%; Ti: 0.5~9%; Zr: 0~6%; Nb: 0~5.95%; Sb: 0~0.1%; the refractive index n of the optical glass is... d The Abbe number is between 1.80 and 1.88. d The coefficient of thermal expansion is 30-40. The optical glass of this invention has advantages such as a low coefficient of thermal expansion, good transmittance, low density, and low liquidus temperature, making it suitable for mass production. It can be manufactured into high-precision optical elements, components, and lenses, applicable to optical imaging systems such as projection, monitoring, various consumer electronics, and microscopes. The optical glass of this invention also has advantages such as good crystallization performance, excellent processability, and low production cost, exhibiting good mass production capabilities and superior internal product quality.
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