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Proceedings Paper

Laser IMaging And Ranging System (LIMARS): a proof-of-concept experiment
Author(s): Kevin W. Ayer; William C. Martin; James M. Jacobs; Robert H. Fetner
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Paper Abstract

This paper presents an imaging scheme for high-resolution 3D characterization of potential targets. The phenomenology exploited is the linear electrooptic effect to produce pixel registered range maps and images. The technique requires illumination using a pulsed laser source. The return signal from the target region is modulated using an electrooptic shuttering device which temporally varies the polarization of the return illumination in a controlled manner. The degree of return signal polarization modulation is proportional to the time of arrival. A dual camera data acquisition system senses the two polarization states as a function of time. The sensed illumination at one camera is ratioed to the other camera illumination. The ratio value is a unique number specific to the relative range of the return for that pixel or pixel region. A critical advantage of this technique is self-normalization since ratioing the pixel intensities discounts the illumination. Simulated imagery is generated using predicted photon statistics based on the characteristics of the experimental set-up. Experimental data is currently being analyzed to determine sensor scheme performance and potential areas of improvement

Paper Details

Date Published: 1 June 1992
PDF: 9 pages
Proc. SPIE 1633, Laser Radar VII: Advanced Technology for Applications, (1 June 1992); doi: 10.1117/12.59206
Show Author Affiliations
Kevin W. Ayer, Wright Lab. (United States)
William C. Martin, Wright Lab. (United States)
James M. Jacobs, Scientific Services, Inc. (United States)
Robert H. Fetner, Scientific Services, Inc. (United States)

Published in SPIE Proceedings Vol. 1633:
Laser Radar VII: Advanced Technology for Applications
Richard J. Becherer, Editor(s)

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