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:
Jul. 18, 2006
Filed:
May. 16, 2003
Yoshihisa Itoh, Tsurugashima, JP;
Satoru Tanaka, Tsurugashima, JP;
Akihiro Tachibana, Tsurugashima, JP;
Yoshihisa Kubota, Tsurugashima, JP;
Kazuo Kuroda, Tsurugashima, JP;
Satoshi Sugiura, Tsurugashima, JP;
Yoshihisa Itoh, Tsurugashima, JP;
Satoru Tanaka, Tsurugashima, JP;
Akihiro Tachibana, Tsurugashima, JP;
Yoshihisa Kubota, Tsurugashima, JP;
Kazuo Kuroda, Tsurugashima, JP;
Satoshi Sugiura, Tsurugashima, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
A hologram recording and reproducing system having compatibility has: a supporting unit for freely attachably supporting a recording medium including a photosensitive material; a signal light-generating unit for projecting a coherent light beam modulated according to a predetermined data into a recording medium and generating a diffraction grating by providing a three-dimensional light interference pattern in the recording medium; a detector unit for detecting and photoelectrically converting a diffracted light from the diffraction grating; and a demodulating unit for demodulating a predetermined data from an output from the detector unit. The detector unit has an intermediate data-generating unit for generating an intermediate data, and the demodulating unit has a conversion table in which the intermediate data and the predetermined data are uniquely associated, and demodulates the predetermined data by performing a computation based on a correlation in the conversion table.