Glass composition and optical device

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United States of America Patent

PATENT NO 8921246
APP PUB NO 20120319015A1
SERIAL NO

13580603

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Abstract

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There is provided a glass composition containing an oxide containing Lu, Si, and Al, in which the composition of the glass composition lies within a compositional region of a ternary composition diagram of Lu, Si, and Al in terms of cation percent, the compositional region being defined by the following six points:

    (32.3% LuO3/2, 30.0% SiO2, 37.7% AlO3/2),(32.3% LuO3/2, 37.7% SiO2, 30.0% AlO3/2),(20.8% LuO3/2, 55.0% SiO2, 24.2% AlO3/2),(10.0% LuO3/2, 45.0% SiO2, 45.0% AlO3/2),(20.8% LuO3/2, 24.2% SiO2, 55.0% AlO3/2), and(30.0% LuO3/2, 25.0% SiO2, 45.0% AlO3/2).For the glass composition, a glassy state having low or no intrinsic birefringence in the ultraviolet region is stably obtained.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mukaide, Taihei Yokohama, JP 34 170
Watanabe, Tomohiro Yokohama, JP 81 1331

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