1 February 2001 Measurement of the temporal evolution of periodic induced displacement derivatives using stoboscopic electronic speackle-shearing interferometry
Author Affiliations +
Optical Engineering, 40(2), (2001). doi:10.1117/1.1339876
Abstract
Single pulsed subtraction electronic speckle-shearing pattern interferometry is used to measure the time evolution of deformations induced by periodic impulse loading on a metal plate. This is accomplished with a stroboscopic system based on a pulsed laser and an interline-transfer CCD camera running at 60 frames/s. In a few seconds, a sequence of hundreds of interferograms is recorded with an effective sampling time interval of some tens of microseconds. We describe the experimental setup used to generate the transient deformation on the metal plate and also the synchronization of laser pulses and image acquisition. Several correlation fringe patterns are presented, showing the time evolution of the deformation. Finally, these data are used to calculate optical phase maps and displacement derivative fields for different times after the application of the dynamic load on the object.
Pablo D. Ruiz, Abundio Davila, Gabriel Mendiola, Guillermo H. Kaufmann, "Measurement of the temporal evolution of periodic induced displacement derivatives using stoboscopic electronic speackle-shearing interferometry," Optical Engineering 40(2), (1 February 2001). http://dx.doi.org/10.1117/1.1339876
JOURNAL ARTICLE
7 PAGES


SHARE
KEYWORDS
Pulsed laser operation

Cameras

Metals

Interferometry

Fringe analysis

Speckle

Temporal resolution

RELATED CONTENT

Laser Doppler vibrometry for interoperative monitoring
Proceedings of SPIE (July 01 1998)
High g testing of MEMS devices
Proceedings of SPIE (January 05 2006)
Rapid targeting in support of time-critical strike
Proceedings of SPIE (December 21 2001)
Ultrahigh-sensitivity new super-HARP camera
Proceedings of SPIE (March 25 1996)

Back to Top