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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 27 — Sep. 20, 2006
  • pp: 6932–6939

Speckle correlation method used to detect an object's surface slope

Petr Šmíd, Pavel Horváth, and Miroslav Hrabovský  »View Author Affiliations

Applied Optics, Vol. 45, Issue 27, pp. 6932-6939 (2006)

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We present a technique employing a speckle pattern correlation method for detection of the slope of an object's surface. Controlled translation of an object under investigation and numerical correlation of speckle patterns recorded during its motion give information used to evaluate the tilt of the object. The proposed optical setup uses a symmetrical arrangement of detection planes in the image field and enables one to detect the tilt of an object's surface within the interval ( 10 ° 3 0 ° ) . Simulation analysis shows how to control the measuring range. The presented theory, simulation analysis, and setup are verified through an experiment by measurement of the slope of a surface of a cube made out of steel.

© 2006 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(100.2000) Image processing : Digital image processing
(110.6150) Imaging systems : Speckle imaging
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging

Original Manuscript: December 20, 2005
Manuscript Accepted: May 17, 2006

Petr Smíd, Pavel Horváth, and Miroslav Hrabovský, "Speckle correlation method used to detect an object's surface slope," Appl. Opt. 45, 6932-6939 (2006)

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