Nondestructive holographic reconstruction

Details Nondestructive holographic reconstruction Nondestructive holographic reconstruction

G - Physics

03

H

88/0.14

G03H 1/02 (2006.01) G03H 1/04 (2006.01)

Patent

CA 1322116

PCT/US 88 04713 ABSTRACT OF THE DISCLOSURE method for promoting enhanced nondestructive reconstruction of holograms recorded in photorefractive media (10) involves control of the polarization states of the reconstruction beam (24) and the recording beams (24, 26), control of the cummulative recording energy, and use of a relatively high external field applied across the media (10) during recording which is subsequently reduced during reconstruction. The resulting reconstruction history characteristics are selectively tailored by adjusting the polarization and intensity of the reconstruction beam (24), the recording geometry, and the applied voltage (40) during reconstruction and recording, and various other parameters. In general, the reconstruction efficiency (48) starts at a relatively high level, initially reduces, and then subsequently grows above the starting values, and and be made substantially nondestructive over a typical reconstruction cycle, with erasure times exceeding forty-five minutes.

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