We present a method to determine the three-dimensional (3D) deformation vectors of an arbitrary stressed object by combining stereophotogrammetry and digital holography in a setup with four cameras. The resulting data consists of a dense 3D point cloud, where every point is associated with a deformation vector. Our method is able to calculate the deformation without prior knowledge of the sensitivity vectors or the object surface. In the experimental setup only the base distance of the cameras needs to be known.
© 2012 Optical Society of America
Original Manuscript: February 10, 2012
Revised Manuscript: March 7, 2012
Manuscript Accepted: March 23, 2012
Published: May 25, 2012
Robert Schwede, Holger Babovsky, Armin Kiessling, and Richard Kowarschik, "Measurement of three-dimensional deformation vectors with digital holography and stereophotogrammetry," Opt. Lett. 37, 1943-1945 (2012)
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