Optical glass and optical component

Abstract

The invention provides optical glass and an optical component. The optical glass has negative anomalous dispersion characteristics, low fluorescence and good chemical stability and comprises, by weight, 31% to 55% of SiO2, 15% to 29% of Nb2O5, 0.5% to 9% of ZrO2, 0.5% to 10% of La2O3, and 12% to 30% of R2O; R2O includes one or any of Na2O, Li2O and K2O. The optical glass needs no extra non-environmental elements and is 1.61 to 1.75 in refractive index, 35 to 45 in abbe number, and less than -0.0008 in negative anomalous dispersion DeltaPg, F; measured by a method specified in the Japanese standard JOGIS (japan optical glass industry standard) 03-1975, the fluorescence level is 1. The optical glass has low fluorescence and is widely applicable to devices, such as digital cameras, digital video cameras, camera-phones and fluorescent microscopes.

Description

technical field [0001] The invention relates to an optical glass and an optical element. The optical glass has a refractive index (nd) of 1.61-1.75 and an Abbe number (νd) of 35-45. Optical glass and optical components with low fluorescence performance and good chemical stability. Background technique [0002] Optical glass is an indispensable and important part of optical instruments and optoelectronic products. In recent years, with the widespread popularity of optoelectronic products such as smartphones and SLR cameras, higher requirements have been placed on the performance of optical glass, such as the requirement for optical glass It has the performance of eliminating or eliminating the residual chromatic aberration of the secondary spectrum as much as possible, which requires an optical glass with negative anomalous dispersion performance. The relative partial dispersion of the glass with negative anomalous dispersion performance is small, and the residual chromatic ...

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Problems solved by technology

[0005] For glass with low fluorescence properties, JP Patent Application Hei 10-158029 discloses B 2 o 3 -P 2 o 5 -R 2 O-Nb 2 o 5 and / or Ta 2 o 5 High-dispersion low-fluorescence optical glass, but the glass has the disadvantage of insufficient chemical durability

Another B 2 o 3 -P 2 o 5 -R 2 O-Ta 2 o 5 High-dispersion low-fluorescence optical glass, this kind of glass is not only insufficient in chemical durability and light transmission, but also due to the large amount of expensive Ta 2 o 5 Raw materials, high production cost

In addition, JP Unexamined Patent Publication Hei 10-346449 discloses Ge 2 o 3 -Ta 2 o 5 -R 2 O-based high-dispersion and low-fluorescence optical glass, which also has insufficient chemical durability and contains a large amount of very expensive Ge 2 o 3 components, the manufacturing cost is also very high, and it is not practical

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