Data playback method and device for data recorded as a hologram

Details Data playback method and device for data recorded as a hologram Data playback method and device for data recorded as a hologram

2006-07-07

2010-11-02

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C359S010000, C359S029000

Reexamination Certificate

active

07826324

ABSTRACT:
There is provided a data playback method including: acquiring first image data by illuminating reference light for reading onto an optical recording medium on which a hologram has been recorded by Fourier transforming and simultaneously illuminating reference light and signal light expressing digital data as a light-and-dark image, and detecting an inverse Fourier-transform image of diffracted light which is diffracted by the recorded hologram; acquiring second image data, which is a reversal image of the first image data, by generating combined light by combining the diffracted light and a dc component whose phase is different than a phase of a dc component of the signal light included in the diffracted light, and detecting an inverse Fourier-transform image of the combined light; and computing a difference in luminance for each pixel of the light-and-dark image, by carrying out computing processing by using the first and second image data.

REFERENCES:
patent: 4971409 (1990-11-01), Yeh et al.
patent: 5488494 (1996-01-01), Redfield et al.
patent: 6762865 (2004-07-01), Edwards
patent: 6809845 (2004-10-01), Kim et al.
patent: 7262892 (2007-08-01), Yasuda et al.
patent: 7511867 (2009-03-01), Yasuda et al.
patent: 2001/0007592 (2001-07-01), Pu et al.
patent: 2005/0134948 (2005-06-01), Waldman et al.
patent: 2006/0152783 (2006-07-01), Butler et al.
patent: 1 511 017 (2005-03-01), None
patent: A-10-340479 (1998-12-01), None
patent: A-2000-066565 (2000-03-01), None
patent: A-2000-066566 (2000-03-01), None
patent: A-2004-198816 (2004-07-01), None
patent: WO 99/31531 (1999-06-01), None
Yasua et al.; “Optical Noise Reduction by Reconstructing Positive and Negative Images from Fourier Holograms in Coaxial Holographic Storage Systems;”Optics Letters, OSA, Optical Society of America; Washington, DC, US; vol. 31, No. 11; Jun. 1, 2006; pp. 1639-1641.
Horimai et al., “Collinear Holography;” Applied Optics; Optical Society of America; vol. 44; No. 13; May 1, 2005; pp. 2575-2579.
Yasuda et al.; “Optical Noise Reduction by Reconstructing Positive and Negative Images from Fourier Holograms in Coaxial Holographic Storage Systems;” Optics Letter; Optical Society of America; vol. 31; No. 11; Jun. 1, 2006; pp. 1639-1641.
Aug. 6, 2008 Office Action issued in U.S. Appl. No. 11/527,577.
Jan. 28, 2009 Notice of Allowance issued in U.S. Appl. No. 11/527,577.
Jun. 18, 2007 Notice of Allowance issued in U.S. Appl. No. 11/633,058.

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