Glass sheet with high near-IR transmission and very low visible transmission

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12234180
APP PUB NO 20210309561A1
SERIAL NO

17275916

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A silicate-type glass sheet that includes 0.002-1.1% total iron (expressed as Fe2O3), greater than or equal to 0.005% manganese (expressed as MnO), and optionally 0-1.3% chromium (expressed as Cr2O3). The sum of the contents of total iron, manganese, and chromium, expressed as weight percentages are greater than or equal to 1% of the total weight of the glass. The ratios R1, defined as Fe2O3*/(49+0.43(Cr2O3*—MnO*)), and R2, defined as Fe2O3*/(34+0.3(Cr2O3*—MnO*)), both being less than 1. Fe2O3*, MnO* and Cr2O3* represent the relative percentages with respect to the sum of (Fe2O3+MnO+Cr2O3). Such a glass sheet shows a very low visible transmission together with high IR transmission in the region 1000-2000 nm, especially at wavelengths of interest between 1050 and 1550 nm, thereby valuable within the context of autonomous cars, in particular those fully integrating LiDAR systems.

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Patent Owner(s)

  • AGC GLASS EUROPE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bogaerts, Michel Braine-le-Chateau, BE 7 25
Boland, François Gembloux, BE 2 1
Sartenaer, Yannick Vedrin, BE 25 26

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