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Proceedings Paper

Unintended illumination for PMMW systems
Author(s): Albert Pergande
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Paper Abstract

As Passive Millimeter Wave (PMMW) imagers mature, users have located them in more and more challenging locations. Because PMMW systems typically use natural sky coldness as a contrast source, indoor installations can become problematic. A number of semi-active illumination systems have been proposed, with various degrees of success. A problem many of them suffer from is reversed contrast - the illumination source is considerably hotter than the ambient scene, causing the cameras to act in unexpected ways. The relatively narrow extent of the illumination source is another problem, with speckle and glint often dominating the image. There are a number of unintended illumination sources in indoor locations, and all are poorly understood. This paper will examine several of them, as well as their polarametric properties, and discuss their effects on image quality.

Paper Details

Date Published: 18 April 2008
PDF: 4 pages
Proc. SPIE 6948, Passive Millimeter-Wave Imaging Technology XI, 69480A (18 April 2008); doi: 10.1117/12.796411
Show Author Affiliations
Albert Pergande, Lockheed Martin (United States)

Published in SPIE Proceedings Vol. 6948:
Passive Millimeter-Wave Imaging Technology XI
Roger Appleby; David A. Wikner, Editor(s)

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