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Applied Optics

Applied Optics


  • Vol. 38, Iss. 34 — Dec. 1, 1999
  • pp: 7056–7062

Simultaneous three-dimensional dynamic deformation measurements with pulsed digital holography

Staffan Schedin, Giancarlo Pedrini, Hans J. Tiziani, and Fernando Mendoza Santoyo  »View Author Affiliations

Applied Optics, Vol. 38, Issue 34, pp. 7056-7062 (1999)

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The three deformation components x, y, z of a vibrating object are measured simultaneously by use of digital holography with a double-pulse ruby laser source. The object is illuminated from three different directions, each optically path matched with three reference beams such that three independent digital holograms are formed and added incoherently in one single CCD image. The optical phase difference between the two recordings taken for each hologram is quantitatively evaluated by the Fourier-transform method so that a set of three phase maps is obtained, representing the deformation along three sensitivity vectors. The total object deformation is obtained as a vector resultant from the data of the three phase maps. To give the full three-dimensional (3-D) description, the shape of the object is measured by the two-wavelength contouring method. Experiments are performed with a cylinder as the test object, transiently and harmonically excited. The 3-D deformation and shape measurement results are presented graphically.

© 1999 Optical Society of America

OCIS Codes
(040.1520) Detectors : CCD, charge-coupled device
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(140.3540) Lasers and laser optics : Lasers, Q-switched

Original Manuscript: July 7, 1999
Revised Manuscript: September 13, 1999
Published: December 1, 1999

Staffan Schedin, Giancarlo Pedrini, Hans J. Tiziani, and Fernando Mendoza Santoyo, "Simultaneous three-dimensional dynamic deformation measurements with pulsed digital holography," Appl. Opt. 38, 7056-7062 (1999)

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