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:
Mar. 28, 2006
Filed:
Jan. 27, 2004
Manabu Shiozaki, Osaka, JP;
Masakazu Shigehara, Yokohama, JP;
Manabu Shiozaki, Osaka, JP;
Masakazu Shigehara, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
In a diffraction grating element, between a first mediumand a fourth medium, a second mediumand a third mediumare disposed alternately to form a diffraction grating. The light, which enters the diffraction grating from the first medium, is diffracted at the diffraction grating portion and output to a fourth medium. Or, the light, which enters the diffraction grating from the fourth medium, is diffracted at the diffraction grating portion and output to the first medium. The index of refraction n–nof each medium satisfies a relational expression of 'n<n<n, n≦n≦n' or 'n≦n≦n, n<n<n'.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile