Optical glass, glass preforms, optical components and optical instruments

Abstract

The invention provides an optical glass, the components of which are represented by mole percentage, containing: P 2 o 5 : 10~50%; Nb 2 o 5 : 10~35%; R 2 O: 15-50%; TiO 2 : 1~20%, of which TiO 2 / Nb 2 o 5 is 1.0 or less, the R 2 O is for Li 2 O, Na 2 O, K 2 The total content of O. Through reasonable component design, the optical glass of the present invention has a lower temperature coefficient of refraction index and excellent stability against sunlight while having expected refraction index and Abbe number.

Description

technical field [0001] The invention relates to an optical glass, in particular to an optical glass with a refractive index of 1.73-1.82 and an Abbe number of 19-31. Background technique [0002] In the prior art, glass with a refractive index of 1.73-1.82 and an Abbe number of 19-31 belongs to high refractive index and high dispersion optical glass, and is widely used in various lens designs. In recent years, vehicle lens equipment has been vigorously developed. Compared with general photography and other applications, the quality of vehicle-mounted lenses is closely related to safety, so the design of vehicle-mounted lenses places more emphasis on the reliability of the equipment, especially when it is exposed outside the vehicle body and needs to withstand harsh working environments, such as reversing cameras and front-view cameras. , rearview mirror auxiliary camera, etc. [0003] The principle of designing a vehicle-mounted lens to meet the harsh working environment i...

AI Technical Summary

Problems solved by technology

[0009] The optical glass used for vehicle lenses is exposed to the natural environment for a long time, and it will receive sunlight for a long time, especially in the strong ultraviolet environment such as plateau, which will easily lead to the reduction of various performances of the glass and shorten the service life of the optical glass. Therefore, it is particularly important to develop an optical glass with excellent sunlight resistance and stability.

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