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Applied Optics

Applied Optics


  • Vol. 38, Iss. 28 — Oct. 1, 1999
  • pp: 5956–5961

Dynamic measurements of internal three-dimensional displacement fields with digital speckle photography and flash x rays

Per Synnergren and H. Timothy Goldrein  »View Author Affiliations

Applied Optics, Vol. 38, Issue 28, pp. 5956-5961 (1999)

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A metrology system is presented that measures internal three-dimensional (3-D) displacement fields. The system uses a stereo pair of flash x-ray heads and correlation analysis to measure the true deformation of a layer of x-ray-absorbent particles inside the specimen. The 3-D deformation field inside blocks of polyester was determined. The polyester blocks were impacted by a 9-mm steel ball bearing fired from a 9-mm-bore gas gun at a speed of 373.5 ± 3.0 m s-1. At a given time after impact, a short-duration (30 ns) flash x-ray pulse exposes the x-ray radiographs and freezes the events during impact. Thereafter, the x-ray radiographs are scanned into a personal computer and analyzed as in digital speckle photography.

© 1999 Optical Society of America

OCIS Codes
(000.2190) General : Experimental physics
(100.5010) Image processing : Pattern recognition
(100.6890) Image processing : Three-dimensional image processing
(120.3940) Instrumentation, measurement, and metrology : Metrology
(320.3980) Ultrafast optics : Microsecond phenomena
(340.7440) X-ray optics : X-ray imaging

Original Manuscript: May 3, 1999
Published: October 1, 1999

Per Synnergren and H. Timothy Goldrein, "Dynamic measurements of internal three-dimensional displacement fields with digital speckle photography and flash x rays," Appl. Opt. 38, 5956-5961 (1999)

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