Optical glass and optical element

Abstract

The invention provides optical glass and an optical element. The optical glass comprises the following components: 12 wt% to 18 wt% of SiO2, 20 wt% to 25 wt% of B2O3, 1 wt% to 6 wt% of La2O3, 1 wt% to6 wt% of Eu2O3, 1 wt% to 6 wt% of Sm2O3, 1 wt% to 6 wt% of CeO2, 4 wt% to 9 wt% of Ta2O5, 21 wt% to 28 wt% of ZrO2, 8 wt% to 16 wt% of Nb2O5, and 10 wt% to 16 wt% of Li2O. Through addition of Eu2O3,Sm2O3, CeO2 and Ta2O5, the transformation temperature of glass is effectively reduced. Experimental results show that the optical glass prepared by using the method provided by the invention has a refractive index of 1.75 to 1.8, an Abbe number of 50 to 54 and a transformation temperature of 580 to 595 DEG C.

Description

technical field [0001] The invention relates to the technical field of optical glass, in particular to an optical glass and an optical element. Background technique [0002] In recent years, with the development of the optoelectronic industry, the requirements for miniaturization, light weight, and high performance have been put forward for optical equipment. In order to reduce the number of lenses that constitute the optical system in optical equipment, more and more aspheric surfaces are used in optical design. lens. Precision molding is now widely used in the manufacture of aspheric lenses. The so-called precision compression 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 and an optical function surface. Aspherical lenses manufactured by precision molding technology usually do not need to be ground and polished, which red...

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Problems solved by technology

[0005] However, the transition temperature of the above reported optical glass is relatively high

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