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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 22 — Nov. 15, 2012
  • pp: 4702–4704

Distance measurement technique using tilted interference fringe systems and receiving optic matching

Philipp Günther, Robert Kuschmierz, Thorsten Pfister, and Jürgen Czarske  »View Author Affiliations

Optics Letters, Vol. 37, Issue 22, pp. 4702-4704 (2012)

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The precise measurement of the distance of fast laterally moving rough surfaces is important in several applications such as lathe monitoring. A nonincremental interferometer based on two tilted interference fringe systems and a precise phase-difference estimation has been realized for this task. However, due to the speckle effect, the two scattered light signals exhibit different phase jumps and random envelopes causing small correlation coefficients and high uncertainties of the phase difference as well as the distance. In this Letter we present for the first time a method to enhance the signal correlation coefficient significantly. The interference signals are generated by scattered light of a rough surface from two different directions. A matching of illumination and receiving optic is performed. By this novel method, distance measurements with an uncertainty down to 1.2 μm at about 10m/s lateral moving velocity have been achieved. Together with the simultaneously measured lateral velocity, the shape of rotating objects can be precisely determined.

© 2012 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: June 22, 2012
Revised Manuscript: October 5, 2012
Manuscript Accepted: October 8, 2012
Published: November 9, 2012

Philipp Günther, Robert Kuschmierz, Thorsten Pfister, and Jürgen Czarske, "Distance measurement technique using tilted interference fringe systems and receiving optic matching," Opt. Lett. 37, 4702-4704 (2012)

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