1 May 1994 High-speed laser speckle photography. Part 2: rotating mirror camera control system and applications
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Abstract
A rotating mirror camera and pulsed ruby laser have been combined to record laser speckle photographs at framing rates in the range of 105 to 106 frames/s. The laser is repetitively Q-switched by means of a Pockels cell, which is controlled by photodetectors inside the camera. This allows well-correlated , double-exposu re speckle photographs to be recorded on two separate runs of the camera. The photographs are analyzed by an automated image processing system to give whole-field displacement data with submicron accuracy. The illustrations show the dynamic displacement field in polymethyl methacrylate due to solid particle impact. The camera/laser system has potential applications for other stress analysis techniques, such as photoelasticity, the method of caustics, and moiré interferometry.
Jonathan Mark Huntley, Jonathan Mark Huntley, John E. Field, John E. Field, } "High-speed laser speckle photography. Part 2: rotating mirror camera control system and applications," Optical Engineering 33(5), (1 May 1994). https://doi.org/10.1117/12.168543 . Submission:
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