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Proceedings Paper

Moving Object Holography With Unblurfed Images Of Normal Brightness
Author(s): Don B. Neumann
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Paper Abstract

If a diffuse object moves during the formation of a hologram, the scattered light will be doppler shifted in frequency with the amount of shift dependent on the direction in which the light is scattered. When a portion of this scattered light is interfered with a fixed frequency reference beam, the resulting interference pattern will in general not be stationary. Since the hologram exposure is an integrating process over a time large compared to the fluctuations of the interference pattern (for any significant notion of the object), the recorded fringe contrast necessary for bright reconstruction is not obtained. However, if the light scattered by the moving object can be "sorted" by frequency such that all the light striking any point of the hologram is of a single frequency, and if a reference beam of that same frequency is provided at that point, then the interference pattern will be stationary and high contrast fringes will be recorded. If this condition is met at all points of the hologram, the fringes for any point of the object will be maximun (as good as for no object motion and the usual uniform frequency reference beam) over the entire hologram. It can be shown that such a hologram will reconstruct the point with no blurring (motion is "stopped") and since the entire hologram contributes to the reconstruction, the brightness of the reconstructed point will be the same as if no motion occured. (Ref. 1)

Paper Details

Date Published: 1 January 1968
PDF: 4 pages
Proc. SPIE 0015, Holography I, (1 January 1968); doi: 10.1117/12.946780
Show Author Affiliations
Don B. Neumann, USAF Avionics Laboratory (United States)

Published in SPIE Proceedings Vol. 0015:
Holography I
Bernard G. Ponseggi; Brian J. Thompson, Editor(s)

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