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1 March 1974 Three Dimensional Image Reconstruction From Longwave Holograms - A Feasibility Study
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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.
© (1974) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
N. H. Farhat and A. K. Chua "Three Dimensional Image Reconstruction From Longwave Holograms - A Feasibility Study", Proc. SPIE 0052, Coherent Optical Processing, (1 March 1974);

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