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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 1 — Jan. 1, 2002
  • pp: 130–135

Enhancement of the dynamic range of the detected intensity in an optical measurement system by a three-channel technique

Klaus-Peter Proll, Jean-Marc Nivet, Christoph Voland, and Hans J. Tiziani  »View Author Affiliations


Applied Optics, Vol. 41, Issue 1, pp. 130-135 (2002)
http://dx.doi.org/10.1364/AO.41.000130


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Abstract

When three-dimensional optical topometry of technical surfaces is performed, one major problem is that often the local reflectance of the object’s surface varies within a wide range. This leads to overexposed and underexposed areas on the detector, where no measurements can be made. To overcome this problem, we have developed a method that extends the dynamic range of an imaging system. As an example we implemented this method to a measurement system that is based on fringe projection with a data projector and a color CCD camera. By projection of quasi-monochromatic fringes a different dynamic range in each of the three color channels of the camera is achieved. Hence the overall dynamic range of the system is increased by a factor larger than 5.

© 2002 Optical Society of America

OCIS Codes
(110.0110) Imaging systems : Imaging systems
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(150.6910) Machine vision : Three-dimensional sensing

History
Original Manuscript: May 7, 2001
Revised Manuscript: July 30, 2001
Published: January 1, 2002

Citation
Klaus-Peter Proll, Jean-Marc Nivet, Christoph Voland, and Hans J. Tiziani, "Enhancement of the dynamic range of the detected intensity in an optical measurement system by a three-channel technique," Appl. Opt. 41, 130-135 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-1-130

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