Deformation measurements of specular reflecting objects using holographic interferometry with diffuse illumination

Rene Skov Hansen; Soren Hassing

doi:10.1117/12.215323

27 July 1995 Deformation measurements of specular reflecting objects using holographic interferometry with diffuse illumination

Rene Skov Hansen, Soren Hassing

Author Affiliations +

Proceedings Volume 2577, International Conference on Applications of Optical Holography; (1995) https://doi.org/10.1117/12.215323
Event: International Conferences on Optical Fabrication and Testing and Applications of Optical Holography, 1995, Tokyo, Japan

Abstract

We demonstrate that by using diffuse object illumination, deformation measurements with hologrpahic interferometry can be performed on a specularly reflecting object without the use of any additional coating of the object surface. An expression for the secondary fringe formation is found, and the system is found only to be sensitive to deformations along the surface. The fringe visibility is studied for a rigid rotation of the object by using the theory of speckle decorrelation. It is found that maximum fringe visibility is obtained if the recording camera is focused on the surface of the object. Agreement between the theory and the experimental results are found.

Citation Download Citation

Rene Skov Hansen and Soren Hassing "Deformation measurements of specular reflecting objects using holographic interferometry with diffuse illumination", Proc. SPIE 2577, International Conference on Applications of Optical Holography, (27 July 1995); https://doi.org/10.1117/12.215323

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