Non-volatile readout of shift multiplexed holograms

Details Non-volatile readout of shift multiplexed holograms Non-volatile readout of shift multiplexed holograms

1996-11-25

1999-11-02

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

For producing or reconstructing images from multiple holograms

359 10, 359 11, 359 29, 359 30, 365125, 369103, G03H 126

Patent

active

059781122

ABSTRACT:
The present invention is a holographic reconstruction device for reconstructing successive holograms previously recorded by a recording reference beam in a recording medium, each previously recorded successive hologram being spaced apart a recording displacement. The recording reference beam has a recording wavelength in the range where the recording medium is photosensitive and a recording propagation angle. The device comprises a reconstruction mechanism having a reconstruction reference beam with a reconstruction wavelength in the range where the recording medium is relatively photo-insensitive and a reconstruction propagation angle. The reconstruction reference beam is provided onto the recording medium. Also, a succession of relative displacements in the recording medium is produced and each of the displacements are equal to the distance of the recording displacements with which the holograms were previously recorded. In addition, a detection device detects reconstruction of the previously recorded holograms at the reconstruction wavelength.

REFERENCES:
patent: 4420829 (1983-12-01), Carlson
patent: 5438439 (1995-08-01), Mok et al.
patent: 5671073 (1997-09-01), Psaltis et al.

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