1 October 2006 Surface strain distribution on thin metallic plates using 3-D digital holographic interferometry
Author Affiliations +
Optical Engineering, 45(10), 105603 (2006). doi:10.1117/1.2360157
Separation of the surface strain gradient as a function of x and y was achieved using three-dimensional (3-D) digital holographic interferometry. The optical setup is capable of independently determining the x, y, and z displacements of the object surface. The magnitude contributions of the dependent, or interconnected, strain gradients are calculated from the normal strain gradients. In order to simplify the mathematical model, objects with smooth surfaces were considered and also only small static loads were applied to deform them. The 3-D information thus gathered is analyzed in order to obtain the x and y strain gradients. Each gradient is then processed to obtain a pair of mutually dependent gradient maps. These maps are shown for the x and y axes in a 3-D sparse vector map that changes according to the strain present on the object.
Manuel de la Torre Ibarra, Fernando Mendoza Santoyo, Carlos Pérez-López, Tonatiuh Saucedo-Anaya, Daniel D. Aguayo, "Surface strain distribution on thin metallic plates using 3-D digital holographic interferometry," Optical Engineering 45(10), 105603 (1 October 2006). http://dx.doi.org/10.1117/1.2360157

Digital holography

Optical engineering

Holographic interferometry

CCD image sensors


Charge-coupled devices

Data processing

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