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:
Feb. 16, 2010
Filed:
Jan. 24, 2006
Akiko Hirao, Chiba, JP;
Yuji Kubota, Yokohama, JP;
Kazuki Matsumoto, Kawasaki, JP;
Naru Ikeda, Yokohama, JP;
Yoshinori Honguh, Yokohama, JP;
Yuzo Hirayama, Yokohama, JP;
Tatsuo Saishu, Tokyo, JP;
Junichi Akiyama, Kawasaki, JP;
Akiko Hirao, Chiba, JP;
Yuji Kubota, Yokohama, JP;
Kazuki Matsumoto, Kawasaki, JP;
Naru Ikeda, Yokohama, JP;
Yoshinori Honguh, Yokohama, JP;
Yuzo Hirayama, Yokohama, JP;
Tatsuo Saishu, Tokyo, JP;
Junichi Akiyama, Kawasaki, JP;
Kabushiki Kaish Toshiba, Tokyo, JP;
Abstract
A method of holographic recording and reproduction includes recording to the holographic recording medium a wavelength variation reference pattern which is recorded as a hologram at a wavelength of the recording beam, recording to the holographic recording medium a page data pattern as a hologram at the wavelength of the recording beam, detecting the wavelength variation between the recording beam and the reproducing beam based on the size of an image for wavelength variation reference obtained by reproducing the wavelength variation reference pattern at a wavelength of the reproducing beam, and reproducing the page data pattern using the reproducing beam with a wavelength controlled based on the detected wavelength variation.