The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 2011
Filed:
Oct. 13, 2004
Makoto Kumatoriya, Otsu, JP;
Shinichiro Chiku, Kyoto, JP;
Mikio Geho, Otsu, JP;
Takashi Fujii, Otsu, JP;
Kenji Kitamura, Tsukuba, JP;
Shunji Takekawa, Tsukuba, JP;
Masaru Nakamura, Tsukuba, JP;
Makoto Kumatoriya, Otsu, JP;
Shinichiro Chiku, Kyoto, JP;
Mikio Geho, Otsu, JP;
Takashi Fujii, Otsu, JP;
Kenji Kitamura, Tsukuba, JP;
Shunji Takekawa, Tsukuba, JP;
Masaru Nakamura, Tsukuba, JP;
National Institute for Materials Science, Ibaraki, JP;
Abstract
An optical material includes lithium tantalate, and a molar composition ratio of lithium oxide and tantalum oxide (LiO/TaO) in the lithium tantalate is in the range of 0.975 to 0.982. Since an optical material having a high refractive index is provided in an optical unit, at the same focal distance, a lens thickness can be significantly reduced. As a result, an optical electronic component and an optical electronic device including the optical material has a reduced size and thickness and is highly functional.