Patent Number: 7,787,346

Title: Hologram recording method and device, hologram reproduction method and device, and optical recording medium

Abstract: There is provided a hologram recording method, including generating a signal light which is spatially modulated such that digital data is represented by an image of intensity distribution, irradiating the signal light on an optical recording medium after a Fourier transformation of the signal light such that a zero-order component of the signal light comes into focus at a point removed from the optical recording medium, forming a diffraction grating in the optical recording medium by interference between the zero-order component of the signal light and a high-order component thereof, and recording digital data represented by the signal light as a hologram.

Inventors: Ogasawara; Yasuhiro (Kanagawa, JP), Minabe; Jiro (Kanagawa, JP), Yasuda; Shin (Kanagawa, JP), Kawano; Katsunori (Kanagawa, JP), Hayashi; Kazuhiro (Kanagawa, JP), Haga; Koichi (Kanagawa, JP), Yoshizawa; Hisae (Kanagawa, JP), Furuki; Makoto (Kanagawa, JP)

Assignee: Fuji Xerox Co., Ltd.

International Classification: G11B 7/00 (20060101)

Expiration Date: 8/31/12018