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:
Jun. 26, 2007
Filed:
Nov. 07, 2003
Mikio Sugiki, Kanagawa, JP;
Kazuo Takahashi, Tokyo, JP;
Shigeo Kobayashi, Chiba, JP;
Tomiji Tanaka, Miyagi, JP;
Koji Ishioka, Kanagawa, JP;
Kenjiro Watanabe, Tokyo, JP;
Mikio Sugiki, Kanagawa, JP;
Kazuo Takahashi, Tokyo, JP;
Shigeo Kobayashi, Chiba, JP;
Tomiji Tanaka, Miyagi, JP;
Koji Ishioka, Kanagawa, JP;
Kenjiro Watanabe, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A holographic recording/reproducing apparatus includes a splitter unit for splitting a laser beam into a first laser beam for generating a signal beam and a second laser beam which serves as a reference beam, a spatial light modulator for spatially modulating the first laser beam in accordance with information to be recorded, the modulated first laser beam serving as the signal beam, and a first lens system for focusing the signal beam and the reference beam onto a holographic recording medium. In a recording process, the signal beam and the reference beam are guided through one and the other half-regions separated along the optical axis of the first lens system. In a reproduction process, only the reference beam is guided through one of the half-regions and a signal reproduction beam from the holographic recording medium is guided through a second lens system in the other half-region.