Optical: systems and elements – Holographic system or element – Having particular recording medium
Patent
1992-05-06
1994-05-17
Ben, Loha
Optical: systems and elements
Holographic system or element
Having particular recording medium
359 3, 430 2, G03H 102, G03H 114, G03C 100
Patent
active
053133153
ABSTRACT:
In a conventional hologram, a photographic film records the interference pattern of monochromatic light, scattered from an object (20) to be imaged, with a reference beam of unscattered light. Illumination of the developed film with a replica of the reference beam then creates a virtual image of the original object. Molecular resonance may be used to record an interference pattern between light signals that arrive at different times, and with this technique create a hologram (10') with time resolution. Using a time reference pulse (16) as a "light shutter", holographic images may be recorded selectively, according to the time taken by light travelling from the object to the hologram. This method may be used to image an object obscured by a light-scattering medium.
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Feinberg Jack L.
Rebane Alexander
Ben Loha
Jr. John Juba
University of Southern California
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