A kind of high refractive index optical glass and its preparation method

Abstract

The invention discloses a high-refractivity optical glass and a preparation method thereof. The high-refractivity optical glass contains the following components in molar percentage: 10%-12% of silica, 31%-33% of lanthanum trioxide, 22%-25% of boron trioxide, 10%-15% of nano titanium dioxide or nano silicon powder, 5%-10% of alumina, 5%-8% of sodium oxide, 0%-3% of potassium oxide, 1%-5% of calcium oxide and 0%-5% of dispersing agent. The refractivity of the optical glass can be improved by adding high-refractivity titanium dioxide or nano silicon powder, the chemical stability is good, the refractivity is 1.75-1.85 within the wavelength ranging from 280-380, and the optical glass is applicable to high-precision imaging mirrors, an optical system can be simplified, and the imaging quality is improved.

Description

technical field [0001] The invention relates to a glass, in particular to a high-refractive-index optical glass and a preparation method thereof. Background technique [0002] With the rapid development of precision optical instruments, optical information communication, and optoelectronic products, the demand for optical glass with excellent performance is increasing, and the requirements are getting higher and higher. In optical design and optical communication, the refractive index is 1.9 The optical glass between ~2.2 has far-reaching significance for simplifying the optical system, improving the imaging quality, further miniaturizing mobile phones and digital cameras, and advancing optical communication technology. [0003] The traditional glass preparation process generally adds a large amount of expensive Ta2O5 and a certain amount of WO3 to the optical glass formula. Although the refractive index of the optical glass is improved, it also brings high production costs,...

AI Technical Summary

Problems solved by technology

[0003] The traditional glass preparation process generally adds a large amount of expensive Ta2O5 and a certain amount of WO3 to the optical glass formula. Although the refractive index of the optical glass is improved, it also brings high production costs, poor stability, and strong coloring. Defects. On the other hand, the waste etching solution needs to be treated and discharged after reaching the standard. However, the treatment of waste etching solution is difficult and expensive, which greatly increases the production cost and affects economic benefits.

Strengthened glass with anti-glare function must be strengthened and etched twice, and the process is relatively complicated.