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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 33 — Nov. 20, 1999
  • pp: 6849–6858

Image formation with regard to object shadow for objects inside a scattering medium

Iosif L. Katsev, Eleonora P. Zege, and Alexander S. Prikhach  »View Author Affiliations


Applied Optics, Vol. 38, Issue 33, pp. 6849-6858 (1999)
http://dx.doi.org/10.1364/AO.38.006849


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Abstract

The conventional theory of image transfer through a scattering medium treats objects located upon reflecting surfaces. It is shown that, when an object is located inside a scattering medium and shields a part of space, ignoring the shadowing leads to incorrect results, especially for modern time-gating systems. We develop a general theory of image formation including the shadowing effect when an object is located inside a scattering medium. The example of the observation of a submerged object through a windy ocean surface is chosen to illustrate this theory. A few unexpected effects in imaging of a submerged object are found and discussed, including contrast conversion for a sinking object and higher contrast in the shadow image than in the image of the object itself. The conclusion that using the shadow image for detection of a submerged object can be more efficient than using the image of the object itself is of practical significance.

© 1999 Optical Society of America

OCIS Codes
(110.2970) Imaging systems : Image detection systems
(110.2990) Imaging systems : Image formation theory
(110.7050) Imaging systems : Turbid media
(240.6690) Optics at surfaces : Surface waves
(290.1350) Scattering : Backscattering

History
Original Manuscript: February 24, 1999
Revised Manuscript: August 2, 1999
Published: November 20, 1999

Citation
Iosif L. Katsev, Eleonora P. Zege, and Alexander S. Prikhach, "Image formation with regard to object shadow for objects inside a scattering medium," Appl. Opt. 38, 6849-6858 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-33-6849

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