Optical glass and its preparation method, optical element and application

Abstract

The invention provides optical glass, a preparation method thereof, an optical element and an application. In terms of molar percentage of cations, the optical glass is prepared from components as follows: 35%-48% of B<3+>, 0-6% of Si<4+>, 38%-50% of sigma(B<3+>+Si<4+>), 5%-13% of La<3+>, 0-5% of Y<3+>, 0-5% of Gd<3+>, 7%-14% of sigma(La<3+>+Y<3+>+Gd<3+>), 35%-47% of Zn<2+>, 2%-8% of Zr<4+>, 0-4%of Li<+> and 0-0.2% of Sb<3+>; anions of the optical glass are all O<2->. The optical glass has the advantages of low coloring degree, high thermal stability, lower density, and lower glass transitiontemperature and glass yield temperature; the forming and molding temperature is reduced, and energy consumption is reduced; the glass manufacturing cost is lower, and the optical glass is suitable for batch industrial production.

Description

technical field [0001] The invention relates to an optical glass, a preparation method thereof, an optical element and an application thereof, and belongs to the field of optical glass. Background technique [0002] Optical glass is a glass material used to manufacture lenses, prisms, mirrors and windows in optical instruments or mechanical systems. Especially after the introduction of features such as auto focus and zoom functions in mobile phones, the demand for optical glass lenses has increased, which has promoted the development of the optical lens industry. According to the market demand in recent years, it can be seen that optical glass with a refractive index above 1.70 and an Abbe number around 50 is particularly favored by the market. On the one hand, this kind of glass has the characteristics of high refractive index, which can reduce the volume of the lens. On the other hand, it has the characteristics of high Abbe number, which can reduce and correct the chroma...

AI Technical Summary

Problems solved by technology

[0008] Chinese patent application CN1903762A discloses an optical glass with a refractive index above 1.65 and an Abbe number of 50-60, which contains 5-20% Li 2 O, the expansion coefficient of the glass is large, resulting in poor thermal stability of the glass

[0011] Chinese patent application CN101397189A discloses an optical glass with a refractive index of 1.75-2.00 and an Abbe number of 35-55, which contains refractory ZrO 2 +Nb 2 o 5 The amount of more than 13% and less than 20% will lead to high melting temperature of glass, which is not conducive to the reduction of glass melting cost

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