Backscatter Effects in Active Illumination Systems

  • R. W. Rampolla
Part of the Optical Physics and Engineering book series (OPEG, volume 1)


The feasibility of employing artificial illumination to enhance the capability of low-light-level television sensors depends not only on the illuminator providing adequate light level at the scene, but, equally important, on obtaining good contrast transmission through the intervening atmospheric path between the scene and the receiver. It is well known that even under normal illumination conditions ambient light that is scattered into the field of view of the receiver causes a degradation in the apparent contrast of the scene as viewed at the position of the observer.


Receiver Field Modulation Transfer Function Apparent Contrast Artificial Illumination Television Sensor 
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  1. 1.
    W. K. Middleton, Vision through the Atmosphere, University of Toronto Press, Toronto (1952).Google Scholar
  2. 2.
    E. O. Hulbert, “Optics of Atmospheric Haze,” J. Opt. Soc. Am. 31, 467–476 (1941); “Optics of Searchlight Illumination,” J. Opt. Soc. Am. 36, 483–491 (1946).CrossRefGoogle Scholar
  3. 3.
    W.D.Chesterman and W.S. Stiles, “The Visibility of Targets in a Naval Searchlight Beam,” in Symposium on Searchlights, Ilium. Eng. Soc., London (1948), pp. 75–102.Google Scholar

Copyright information

© Plenum Press, New York 1971

Authors and Affiliations

  • R. W. Rampolla
    • 1
  1. 1.Systems Development DivisionWestinghouse Electric CorporationBaltimoreUSA

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