Storing information in dual holographic images

Details Storing information in dual holographic images Storing information in dual holographic images

1989-10-23

1991-08-13

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

Having particular recording medium

350 367, 350 377, 350320, G02H 102, G03H 110, G02B 2700

Patent

active

050391828

ABSTRACT:
A holographic storage system receives light having its linear polarization rotated from a reference linear polarization for carrying given information. The modulated light is stored as two distinct images in a photorefractive crystal, the images carrying the same information but being complementary projections of linear polarization rotations from the reference linear polarization in a given rotational sense. The images are stored in the same volume portion of the crystal. Upon readout, the two images are converted into modulated electrical signals. To reproduce the information, one of the modulated electrical signals is divided into the other modulated electrical signal. A function of square root of arc tangent is introduced into the signal processing at the output portion of the system.

REFERENCES:
patent: 3544189 (1970-12-01), Chen et al.
patent: 3620589 (1971-11-01), Dudderar et al.
patent: 3622220 (1971-11-01), Kogelnik
patent: 3698789 (1972-10-01), Wolber
patent: 3825316 (1974-07-01), Amodei
patent: 3834787 (1974-09-01), Oshida
patent: 3891976 (1975-06-01), Carlsen
patent: 3915549 (1975-10-01), Amodei et al.
patent: 4138189 (1979-02-01), Huignard et al.
patent: 4449785 (1984-05-01), Huignard et al.
patent: 4478481 (1984-10-01), Fusek et al.
patent: 4655542 (1987-04-01), Dube
patent: 4720158 (1988-01-01), Kowayawa et al.
patent: 4739496 (1988-04-01), Marom et al.
patent: 4807970 (1989-02-01), Dube et al.
patent: 4830444 (1989-05-01), Cloonan et al.
L. d'Auria et al. "Experimental Holographic Read-Write Memory Using 3-D Storage", Applied Optics vol. 13, No. 4, Apr. 1974, pp. 808-818.

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