High-refraction lanthanum crown optical glass and optical element

Abstract

The invention provides high-refraction lanthanum crown optical glass and an optical element. The high-refraction lanthanum crown optical glass comprises the following components: 23-28wt% of SiO2, 18-24wt% of B2O3, 10-12wt% of La2O3, 3-8wt% of La2F3, 1-5wt% of La2K3, 8-12wt% of Y2O3, 1-5wt% of Ta2O5, 6-10wt% of ZnO, 2-8wt% of Nb2O5 and 1-6wt% of Na2O. Due to addition of B2O3, glass melting and clarification are facilitated; La2O3 is a main component of high-refraction low-chromatic dispersion optical glass; and test results show that the refraction rate of the high-refraction lanthanum crown optical glass provided by the invention is greater than 1.72, and the abbe number of the glass is greater than 50.

Description

technical field [0001] The invention relates to the technical field of optical glass, in particular to a high refraction lanthanum crown optical glass and an optical element. Background technique [0002] Optical glass is an inorganic glass that transmits light through refraction, reflection, and transmission, or changes the intensity or spectral distribution of light through absorption, and is used to manufacture lenses, prisms, mirrors, and windows in optical instruments or mechanical systems. . Optical glass has good light transmission performance and high refractive index, and is widely used in the manufacture of optical instruments such as spectacle lenses, cameras, telescopes, microscopes and lenses. [0003] High refraction lanthanum crown optical glass usually refers to high refraction and low dispersion optical glass with refractive index > 1.72 and Abbe number > 50. This type of glass belongs to edge optical glass and is also a key material for large apertur...

AI Technical Summary

Problems solved by technology

[0005] However, research on high-refraction and low-dispersion lanthanum crown optical glasses with a refractive index > 1.72 and an Abbe number > 50 is less

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