Optical glass and optical element

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United States of America Patent

PATENT NO 9145328
APP PUB NO 20140221191A1
SERIAL NO

14343559

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Abstract

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The present invention is aimed to provide a cost-effective optical glass with refractive index of 1.74-1.80 and Abbe number of 47-51 but containing no Gd2O3 and an optical element made hereof. The optical glass contains the following components according to percentage by weight: more than 2.7% but less than 10% of SiO2, 20-31% of B2O3, 38-49% of La2O3, more than 12% but less than 20% of Y2O3, more than 1% but less than 4% of ZnO, more than 0.5% but less than 3% of Nb2O5, wherein the content of ZnO is more than that of Nb2O5, 0-5% of Ta2O5, 0-5% of RO, wherein the RO is one or more of CaO, SrO and MgO, and content of ZrO2 is more than 6.7% but less than 15%. The present invention is a lanthanum borate glass containing no Gd2O3. A stable glass can be obtained by adjusting the content of La2O3, B2O3 and Y2O3.

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Patent Owner(s)

Patent OwnerAddress
CDGM GLASS CO LTD610100 CHENGDU LONGQUANYI DISTRICT SICHUAN PROVINCE NO 359 SECTION 3 OF CHENGLONG AVENUE CHENGDU CITY SICHUAN PROVINCE 610100

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sun, Wei Sichuan, CN 828 5397

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