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Proceedings Paper

Three Dimensional Image Reconstruction From Longwave Holograms - A Feasibility Study
Author(s): N. H. Farhat; A. K. Chua
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Paper Abstract

This paper concerns itself with the investigation of a method for solving the long-standing problem of longitudinal image distortion encountered in longwave (microwave or acoustic) holography that has so far prevented the exploitation of the three dimensional imaging capability of holography. A scheme for real-time, distortionless image recon, struction from longwave holograms that has the potential of yielding three dimensional images which can be viewed with the unaided eye is described. The scheme is based on combining the operations of a spatial microwave modulator with that of a plasma chamber in which visualization is due to light emission caused by microwave induced enhanced ionization and subsequent luminosity in a weakly ionized r.f. plasma. The scheme has the advantage of being implementable in real-time when a light value is added. Relatively low level millimeter microwave reconstruction power of .6 watts average is shown to be sufficient for the reconstruction of a three dimensional image consisting of 1000 resol-vable points using commercially available millimeter wave sources assuming that the local enhanced luminosity is caused by a doubling of the ionization rate in a low frequency r.f. discharge plasma.

Paper Details

Date Published: 1 March 1974
PDF: 7 pages
Proc. SPIE 0052, Coherent Optical Processing, (1 March 1974); doi: 10.1117/12.954187
Show Author Affiliations
N. H. Farhat, University of Pennsylvania (United States)
A. K. Chua, University of Pennsylvania (United States)


Published in SPIE Proceedings Vol. 0052:
Coherent Optical Processing
H. John Caulfield, Editor(s)

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