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. 31, 2009
Filed:
Sep. 21, 2005
Kazuki Matsumoto, Kawasaki, JP;
Yuuji Kubota, Yokohama, JP;
Naru Ikeda, Yokohama, JP;
Akiko Hirao, Chiba, JP;
Kazuki Matsumoto, Kawasaki, JP;
Yuuji Kubota, Yokohama, JP;
Naru Ikeda, Yokohama, JP;
Akiko Hirao, Chiba, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
The present invention relates to a method for optical recording in which information is recorded on an optical recording media utilizing holography and to a method for optical reproducing in which information recorded on an optical recording media utilizing holography is reconstructed. The methods includes preparing an optical recording media having wavelength reference marks with a periodic structure which are associated with a recording base wavelength, irradiating the wavelength reference marks with a beam from a light source on recording information or on reproducing information to detect a wavelength shift of the light source with respect to the base wavelength based on a diffraction beam from the wavelength reference marks, and performing recording or reproducing while controlling the wavelength of the light source so as to reduce the wavelength shift.