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:
Apr. 14, 2009
Filed:
Jan. 31, 2006
Yuzuru Yamakage, Kawasaki, JP;
Toshikazu Kanaoka, Kawasaki, JP;
Akiyoshi Uchida, Kawasaki, JP;
Kazushi Uno, Kawasaki, JP;
Hiroyasu Yoshikawa, Kawasaki, JP;
Yuzuru Yamakage, Kawasaki, JP;
Toshikazu Kanaoka, Kawasaki, JP;
Akiyoshi Uchida, Kawasaki, JP;
Kazushi Uno, Kawasaki, JP;
Hiroyasu Yoshikawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A recording and reproducing apparatus includes a light source to emit a laser beam, an information light beam irradiation unit to irradiate a medium with an information light beam, a reference light beam irradiation unit to irradiate the medium with a reference light beam so as to form a specific speckle pattern on the medium. The reference light beam irradiation unit comprises a diffusion board provided in the way of a light path through which the laser beam is passed and generating the reference light beam, a rotation controller to rotate the diffusion board, and an identification information detector to detect identification information previously formed on a surface of the diffusion board. The diffusion board comprises a plurality of encode storage regions in which different identification information is formed and a plurality of diffusion pattern generation regions specified by the identification information. A position of the diffusion board is controlled based on the detected identification information such that a desired diffusion pattern generation region comes to a position through which the laser beam is passed while the laser beam is outputted.