Optical glass with high refractive index and optical element

Abstract

The invention provides an optical glass with high refractive index and an optical element. The optical glass comprises the following components: SiO2, B2O3, BaO, CaO, WO3, ZnO, Nb2O5, Li2O, Ta2O5 and Gd2O3. SB2O3 as the oxide can improve the thermal stability and chemical stability of the glass, and can reduce the softening temperature and fluid viscosity of the glass. BaO can increase the refractive index, density, luster and stability of the optical glass. ZnO can reduce the glass thermal expansion coefficient and density of the glass and improve the chemical stability, thermal stability and the refractive index of the glass. Gd2O3 is an effective component to improve the refractive index and increase the Abbe number of the glass. Experiment results show that the optical glass with high refractive index has refractive index of 1.90-1.96, Abbe number of 52-58, transmission ratio reaching 80%, and the corresponding wavelength less than 370 nm.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to an optical glass with a high refractive index and an optical element. Background technique [0002] In recent years, with the increasing popularity of digital cameras, digital video cameras, camera phones, etc., the integration level and functions of the equipment used for the optical system have increased rapidly, and the optical system has been required to have higher accuracy, lighter weight and smaller size. size of. Therefore, aspheric mirrors are widely used, and the use of aspheric components has become the mainstream of optical design. [0003] The manufacture of aspheric lenses widely uses the method of precision molding. The so-called precision molding is to mold a glass preform with a high-precision mold with a predetermined product shape under a certain temperature and pressure, so as to obtain a glass product with a final product shape or very close to the final prod...

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Problems solved by technology

Therefore, none of the above-mentioned optical glasses can meet the requirement that the refractive index is 1.90-1.96, the Abbe number is 52-58, and when the transmittance reaches 80%, the corresponding wavelength is less than 370nm.

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