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:
Oct. 16, 2007
Filed:
Dec. 21, 2005
Atsushi Fukumoto, Kanagawa, JP;
Mikio Sugiki, Kanagawa, JP;
Mitsuru Toishi, Tokyo, JP;
Naoto Kojima, Kanagawa, JP;
Hitoshi Okada, Chiba, JP;
Koji Takasaki, Chiba, JP;
Atsushi Fukumoto, Kanagawa, JP;
Mikio Sugiki, Kanagawa, JP;
Mitsuru Toishi, Tokyo, JP;
Naoto Kojima, Kanagawa, JP;
Hitoshi Okada, Chiba, JP;
Koji Takasaki, Chiba, JP;
Sony Corporation, , JP;
Abstract
A hologram recording/reproducing device includes a laser light source emitting laser light; a spatial light modulator generating signal light and reference light from the laser light emitted from the laser light source, the signal light and the reference light traveling in a common light path; a first relay lens system including a first shielding plate at a focal position thereof and transmitting the signal light and the reference light generated by the spatial light modulator, the first shielding plate having a pinhole whose size is 1 to 2 times a Nyquist size; a phase modulating element disposed at a conjugate plane of the signal light and the reference light transmitted through the first relay lens system; an objective lens converging the signal light and the reference light transmitted through the phase modulating element on a hologram recording medium; and a light receiving system disposed between the phase modulating element and objective lens and receiving light returning from the hologram recording medium.