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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 1 — Jan. 1, 2009
  • pp: 140–154

Laser Doppler sensor employing a single fan-shaped interference fringe system for distance and shape measurement of laterally moving objects

Thorsten Pfister, Lars Büttner, and Jürgen Czarske  »View Author Affiliations


Applied Optics, Vol. 48, Issue 1, pp. 140-154 (2009)
http://dx.doi.org/10.1364/AO.48.000140


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Abstract

For monitoring the position and shape of fast moving and, especially, rotating objects such as turbo machine rotors, contactless and compact sensors with a high measurement rate as well as high precision are required. We present for the first time, to the best of our knowledge, a novel laser Doppler sensor employing a single fan-shaped interference fringe system, which allows measuring for the position and shape of fast moving solid bodies with known tangential velocity. It is shown theoretically as well as experimentally that this sensor offers concurrently high position resolution and high temporal resolution in contrast to conventional measurement techniques, since its measurement uncertainty is, in principle, independent of the object velocity. Moreover, it can be built very compact, because it features low complexity. To prove its operational capability and its potential for practical applications, radial and axial shape measurements of rotating bodies are demonstrated in comparison with triangulation. An average position resolution of about 2 μm could be achieved.

© 2009 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(150.5495) Machine vision : Process monitoring and control

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: June 19, 2008
Revised Manuscript: November 12, 2008
Manuscript Accepted: November 19, 2008
Published: December 24, 2008

Citation
Thorsten Pfister, Lars Büttner, and Jürgen Czarske, "Laser Doppler sensor employing a single fan-shaped interference fringe system for distance and shape measurement of laterally moving objects," Appl. Opt. 48, 140-154 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-1-140

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