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Applied Optics

Applied Optics


  • Vol. 45, Iss. 5 — Feb. 10, 2006
  • pp: 935–943

On-line surveillance of a dynamic process by a moving system based on pulsed digital holographic interferometry

Giancarlo Pedrini, Igor Alexeenko, Wolfgang Osten, and Ulf Schnars  »View Author Affiliations

Applied Optics, Vol. 45, Issue 5, pp. 935-943 (2006)

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A method based on pulsed digital holographic interferometry for the measurement of dynamic deformations of a surface by using a moving system is presented. The measuring system may move with a speed of several meters per minute and can measure deformation of the surface with an accuracy of better than 50 nm . The deformation is obtained by comparison of the wavefronts recorded at different times with different laser pulses produced by a Nd:YAG laser. The effect due to the movement of the measuring system is compensated for by digital processing of the different holograms. The system is well suited for on-line surveillance of a dynamic process such as laser welding and friction stir welding. Experimental results are presented, and the advantages of the method are discussed.

© 2006 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(120.3940) Instrumentation, measurement, and metrology : Metrology

ToC Category:

Original Manuscript: May 23, 2005
Revised Manuscript: August 2, 2005
Manuscript Accepted: August 2, 2005

Giancarlo Pedrini, Igor Alexeenko, Wolfgang Osten, and Ulf Schnars, "On-line surveillance of a dynamic process by a moving system based on pulsed digital holographic interferometry," Appl. Opt. 45, 935-943 (2006)

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