Optical: systems and elements – Holographic system or element – For producing or reconstructing images from multiple holograms
Patent
1997-07-08
1999-09-07
Spyrou, Cassandra
Optical: systems and elements
Holographic system or element
For producing or reconstructing images from multiple holograms
359 10, 359 11, 359 24, G03H 126
Patent
active
059495588
ABSTRACT:
The invention is embodied in a method of recording successive holograms in a recording medium, using at least a fan of M waves along at least a first axis with a separation angle between adjacent waves and directing the fan of M waves as a reference beam along a reference beam path onto the recording medium, successively modulating a wave with a succession of images to produce a succession of signal beams along a signal beam path lying at a propagation angle relative to the reference beam path so that the signal and reference beams intersect at abeam intersection lying within the medium, the beam intersection having a size corresponding to beam areas of the reference and signal beams, producing a succession of relative displacements in a direction parallel to the first axis between the recording medium and the beam intersection of the signal and reference beam paths in synchronism with the succession of signal beams, each of the displacements being less than the size of the intersection whereby to record successive holograms partially overlapped along a direction of the displacements.
REFERENCES:
patent: 4420829 (1983-12-01), Carlson
Barbastathis George
Levene Michael J.
Psaltis Demetri
Pu Allen
California Institute of Technology
Schuberg Darren E.
Spyrou Cassandra
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