Optical glass

Abstract

The invention discloses optical glass, which is prepared from the following ingredients (by weight): 26-34% of SiO2, 30-40% of B2O3, 9-15% of Nb2O5, 5-11% of BaO, 2-6% of Al2O3, 1-3% of ZnO, 1-3% of MgO, 2-4% of Fe2O3, 1-3% of Y2O3, 0.6-1.4% of Ta2O5, and 0.5-1.5% of Gd2O3. The content and processing meet the following requirements: total content of SiO2 and B2O3 is between 56% and 73%; total content of Ta2O5 and Gd2O3 is less than or equal to 2.8%; transition temperature Tg is below 650 DEG C; and liquidus temperature LT is not higher than 910 DEG C. Through the above composition, high refractive index and low dispersivity are ensured. In addition, the optical glass of the invention is low-cost, has low density, and has excellent properties such as low tendency towards devitrification, high transmittance and the like. It can be known through the relative grinding hardness FA that the optical glass has good processability. In addition, the glass with high refraction and low Abbe number can make up and correct chromatic aberration to minimize chromatic aberration within the narrowest range, and low-cost operation and batch production can be realized in a stable state.

Description

technical field [0001] The invention relates to the field of glass products, in particular to an optical glass. Background technique [0002] Glass that can change the direction of light propagation and change the relative spectral distribution of ultraviolet, visible or infrared light. Optical glass in the narrow sense refers to colorless optical glass; optical glass in the broad sense also includes colored optical glass, laser glass, quartz optical glass, anti-radiation glass, ultraviolet and infrared optical glass, fiber optic glass, acousto-optic glass, magneto-optical glass and photochromic Glass. Optical glass can be used to manufacture lenses, prisms, mirrors and windows in optical instruments. Components made of optical glass are key elements in optical instruments. [0003] Optical glass is the foundation and an important part of the optoelectronic technology industry. Especially after the 1990s, with the continuous integration of optics, electronic information ...

AI Technical Summary

Problems solved by technology

[0010] Chinese patent application CN101003417A discloses an environmentally friendly heavy lanthanum flint glass with a refractive index of 1.74-1.83 and an Abbe number of 32-47, which contains 5-20% TiO 2 , it is easy to cause photochromic effect, and it is not conducive to improving the light transmission performance of glass

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