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:
Dec. 09, 2008
Filed:
Mar. 07, 2007
Applicants:
Takatoshi Yamada, Kanagawa, JP;
Satoshi Kawakita, Tokyo, JP;
Jin Sato, Miyagi, JP;
Kyu Kanno, Miyagi, JP;
Motoo Aiba, Tokyo, JP;
Inventors:
Takatoshi Yamada, Kanagawa, JP;
Satoshi Kawakita, Tokyo, JP;
Jin Sato, Miyagi, JP;
Kyu Kanno, Miyagi, JP;
Motoo Aiba, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 13/18 (2006.01); G02B 5/18 (2006.01); G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The first and second materials of the diffraction element are selected such that the first material's refraction indexes n(λ), n(λ) and n(λ) for the first, second and third wavelengths λand λand the second material's refraction indexes n(λ), n(λ) and n(λ) for the first, second and third wavelengths λand λsatisfy one of the conditions (1) or (2).