Method for holographic storage

Details Method for holographic storage Method for holographic storage

1976-02-18

1977-07-26

Fears, Terrell W.

Communications: electrical

Digital comparator systems

350160P, G11C 1132, G11C 1304

Patent

active

040386473

ABSTRACT:
A method of improving the holographic storage of data by yielding brighter olograms with higher densities which comprises recording an interferogram of an object wave and a reference wave into a holographically recordable medium consisting of an ionic crystal initially with a random distribution of anisotropic centers, and mutually off-set at an angle of at least sin.sup..sup.-1 10.lambda./d wherein d is the crystal thickness and .lambda. the wavelength of the coherent source; and then consecutively exposing the crystal to the object wave and the reference wave, each with a .pi./2 rotation in the plane of polarization but without any change in light intensity, wavelength, or crystal temperature.

REFERENCES:
patent: 3609707 (1971-09-01), Lewis
patent: 3701118 (1972-10-01), O'Conner
patent: 3896420 (1975-07-01), Szabo
patent: 3940748 (1976-02-01), Carson

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