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Optical Engineering

Microstrain detection using simultaneous endoscopic pulsed digital holography
Author(s): Tonatiuh Saucedo-Anaya; Manuel de la Torre Ibarra; Fernando Mendoza Santoyo
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Paper Abstract

A simultaneous 2-D pulsed digital holographic setup that incorporates a rigid endoscope is used to inspect hidden object areas in order to measure microstrains. The system was tested on the internal surface of a harmonically vibrating rectangular metal box with a fracture on its surface. The simultaneous setup allows the acquisition of displacement data from two different object illumination positions at the same time, so that the system is capable of studying nonrepeatable dynamic events. Further analysis using displacement data generates a gradient strain map where the fracture is successfully detected with the corresponding strain magnitude and direction quantified.

Paper Details

Date Published: 1 July 2008
PDF: 4 pages
Opt. Eng. 47(7) 073601 doi: 10.1117/1.2955510
Published in: Optical Engineering Volume 47, Issue 7
Show Author Affiliations
Tonatiuh Saucedo-Anaya, Univ. Autónoma de Zacatecas (Mexico)
Manuel de la Torre Ibarra, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Fernando Mendoza Santoyo, Ctr. de Investigaciones en Óptica, A.C. (Mexico)

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