NASA NTRS · 19930022369
Progress in speckle-shift strain measurement
Abstract
The Instrumentation and Control Technology Division of the Lewis Research Center has been developing an in-house capability to make one dimensional and two dimensional optical strain measurements on high temperature test specimens. The measurements are based on a two-beam speckle-shift technique. The development of composite materials for use in high temperature applications is generating interest in using the speckle-shift technique to measure strains on small diameter fibers and wires of various compositions. The results of preliminary speckle correlation tests on wire and fiber specimens are covered, and the advanced system currently under development is described.
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Lant, Christian T., Barranger, John P., Oberle, Lawrence G., Greer, Lawrence C., III. 1991-05-01. Progress in speckle-shift strain measurement. https://ntrs.nasa.gov/citations/19930022369
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