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Optical Engineering

Imaging Correlography With Sparse Arrays Of Detectors
Author(s): J. R. Fienup; Paul S. Idell
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Paper Abstract

Imaging correlography is a technique for constructing high resolution images of laser-illuminated objects from measurements of back-scattered (nonimaged) laser speckle intensity patterns. In this paper, we investigate the possibility of implementing an imaging correlography system with sparse arrays of intensity detectors. The theory underlying the image formation process for imaging correlography is reviewed, emphasizing the spatial filtering effects that sparse collecting apertures have on the reconstructed imagery. We then demonstrate image recovery with sparse arrays of intensity detectors through the use of computer experiments in which laser speckle measurements are digitally simulated. It is shown that the quality of imagery reconstructed using this technique is visibly enhanced when appropriate filtering techniques are applied. The signal-to-noise ratio of the process and its dependency on array redundancy and number of speckle pattern measurements is also discussed.

Paper Details

Date Published: 1 September 1988
PDF: -777 pages
Opt. Eng. 27(9) 279778 doi: 10.1117/12.7976761
Published in: Optical Engineering Volume 27, Issue 9
Show Author Affiliations
J. R. Fienup, Environmental Research Institute of Michigan (United States)
Paul S. Idell, Air Force Weapons Laboratory (United States)

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