Three Dimensional Image Reconstruction From Longwave Holograms - A Feasibility Study

N. H. Farhat; A. K. Chua

doi:10.1117/12.954187

1 March 1974 Three Dimensional Image Reconstruction From Longwave Holograms - A Feasibility Study

N. H. Farhat, A. K. Chua

Proceedings Volume 0052, Coherent Optical Processing; (1974) https://doi.org/10.1117/12.954187
Event: Acquisition and Analysis of Pictorial Data, 1974, San Diego, United States

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.

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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); https://doi.org/10.1117/12.954187

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KEYWORDS

Microwave radiation

3D image reconstruction

Ionization

Plasma

Holograms

Extremely high frequency

3D image processing

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