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Applied Optics

Applied Optics


  • Vol. 40, Iss. 28 — Oct. 1, 2001
  • pp: 5106–5110

Pulsed digital holographic interferometry for dynamic measurement of rotating objects with an optical derotator

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

Applied Optics, Vol. 40, Issue 28, pp. 5106-5110 (2001)

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A method for measuring dynamic deformations of rotating objects with pulsed digital holography is described. An optical derotator is used to compensate for the rotation. A CCD camera is used to record two holograms with a short time separation (20 µs). Results of deformations between the recordings are obtained after subtraction of the phase distribution between the two digital holograms. Fringe phase maps of the phase subtraction of two holograms compensated by the derotator and recorded with a Q-switched double-pulsed ruby laser are presented. A flat disk and the blades of a fan were investigated. We used an optical arrangement that allowed us to improve laser illumination and energy efficiency. Experimental results on quantitative evaluation of dynamical out-of-plane deformations are presented.

© 2001 Optical Society of America

OCIS Codes
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4630) Instrumentation, measurement, and metrology : Optical inspection

Original Manuscript: January 16, 2001
Published: October 1, 2001

Carlos Pérez-López, Fernando Mendoza Santoyo, Giancarlo Pedrini, Staffan Schedin, and Hans J. Tiziani, "Pulsed digital holographic interferometry for dynamic measurement of rotating objects with an optical derotator," Appl. Opt. 40, 5106-5110 (2001)

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