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Applied Optics

Applied Optics


  • Vol. 39, Iss. 11 — Apr. 10, 2000
  • pp: 1700–1710

Passive ranging through wave-front coding: information and application

Gregory E. Johnson, Edward R. Dowski, Jr., and W. Thomas Cathey  »View Author Affiliations

Applied Optics, Vol. 39, Issue 11, pp. 1700-1710 (2000)

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Passive-ranging systems based on wave-front coding are introduced. These single-aperture hybrid optical–digital systems are analyzed by use of linear models and the Fisher information matrix. Two schemes for passive ranging by use of a single aperture and a single image are investigated: (i) estimating the range to an object and (ii) detecting objects over a set of ranges. Theoretical limitations on estimator-error variances are given by use of the Cramer–Rao bounds. Evaluations show that range estimates with less than 0.1% error can be obtained from a single wave-front coded image. An experimental system was also built, and example results are given.

© 2000 Optical Society of America

OCIS Codes
(150.0150) Machine vision : Machine vision
(150.3040) Machine vision : Industrial inspection
(150.5670) Machine vision : Range finding
(150.6910) Machine vision : Three-dimensional sensing

Original Manuscript: June 10, 1999
Revised Manuscript: October 14, 1999
Published: April 10, 2000

Gregory E. Johnson, Edward R. Dowski, and W. Thomas Cathey, "Passive ranging through wave-front coding: information and application," Appl. Opt. 39, 1700-1710 (2000)

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