Optical: systems and elements – Holographic system or element – Fourier transform holography
Reexamination Certificate
2007-08-28
2007-08-28
Boutsikaris, Leonidas (Department: 2872)
Optical: systems and elements
Holographic system or element
Fourier transform holography
C359S010000, C359S021000, C369S103000
Reexamination Certificate
active
11633058
ABSTRACT:
There is provided a hologram reconstruction method including: onto an optical recording medium in which a hologram is recorded by simultaneously irradiating the Fourier transformed signal beam representing a digital data with a bright and dark image and removing a DC component and the Fourier transformed reference beam thereon, irradiating a first reference beam for reading out that is the same as the reference beam to generate a first diffracted light generated by the recorded hologram, and synthesizing a DC component of a predetermined phase with the generated first diffracted light to generate a first synthesized light; detecting an inverse Fourier transformed image of the first synthesized light to obtain first image data; irradiating a second reference beam for reading out that differs from the reference beam onto the hologram recorded on the optical recording medium to generate a second diffracted light from the recorded hologram, and synthesizing a DC component of a predetermined phase with the generated second diffracted light to generate a second synthesized light; detecting an inverse Fourier transformed image of the second synthesized light to obtain second image data; subtracting one of the first image data and the second image data from the other at each pixel of the light and dark image; and decoding the digital data based on the value obtained by subtraction.
REFERENCES:
patent: 2001/0007592 (2001-07-01), Pu et al.
patent: 2006/0152783 (2006-07-01), Butler et al.
patent: A 2000-66566 (2000-03-01), None
patent: A 2004-198816 (2004-07-01), None
Furuki Makoto
Haga Koichi
Hayashi Kazuhiro
Kawano Katsunori
Minabe Jiro
Boutsikaris Leonidas
Fuji 'Xerox Co., Ltd.
Oliff & Berridg,e PLC
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