To the best of our knowledge, transient deformations have been measured in real time with microsecond temporal resolution for the first time with speckle pattern interferometry. The short exposure period and high framing rate of a high-speed camera at as many as 40, 500 frames per second allow low-power continuous-wave laser illumination and fiber-optic beam delivery to be used. We have applied the technique to measure both harmonic vibration and transient deformation.
© 1999 Optical Society of America
(060.2310) Fiber optics and optical communications : Fiber optics
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
Andrew J. Moore, Duncan P. Hand, Jim S. Barton, and Julian D. C. Jones, "Transient Deformation Measurement with Electronic Speckle Pattern Interferometry and a High-Speed Camera," Appl. Opt. 38, 1159-1162 (1999)