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:
Oct. 01, 2013
Filed:
Sep. 08, 2011
Shinzoh Murakami, Osaka, JP;
Mototaka Taneya, Osaka, JP;
Takahide Ishiguro, Osaka, JP;
Katsushige Masui, Osaka, JP;
Satoru Fukumoto, Osaka, JP;
Takeshi Horiguchi, Osaka, JP;
Shinzoh Murakami, Osaka, JP;
Mototaka Taneya, Osaka, JP;
Takahide Ishiguro, Osaka, JP;
Katsushige Masui, Osaka, JP;
Satoru Fukumoto, Osaka, JP;
Takeshi Horiguchi, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka-shi, JP;
Abstract
In a diffractive element, its grating pattern is so configured that a diffraction angle of a diffracted light beam of a light source that is subject to the first-order diffraction in a diffraction area is matched with an angle of a light beam passing through the diffractive area emitted from a light source and a light source position is matched with a light originating point of the light source that emits a light beam to be transmitted, and the center of light intensity distribution is matched with that of the light source passing through the diffractive element by inclining an optical axis of the light source. A position of the diffractive element is adjusted based on an electric current value generated when a reflected return path light beam of the light source is diffracted by the diffractive element and enters the light source.