Strain Analysis Using TV Speckle Interferometer

H. El-Ghandoor; A. M. Hamed

doi:10.1117/12.943500

1 June 1988 Strain Analysis Using TV Speckle Interferometer

H. El-Ghandoor, A. M. Hamed

Proceedings Volume 0863, Industrial Optoelectronic Measurement Systems Using Coherent Light; (1988) https://doi.org/10.1117/12.943500
Event: 1987 Symposium on the Technologies for Optoelectronics, 1987, Cannes, France

Abstract

A theoretical investigation of the signal processing by Electronic Speckle Pattern Interferometry ESPI is presented. Both optical and electronic noise are considered, and the optimum S/N ratio of ESPI with respect to a new reference/object ratio is obtained. The technique of ESPI is applied to study rough object deformation. We assume that the 1st signal representing one state of the object is recorded on a high resolution film while the 2nd signal representing another state of the object is recorded in real time through TV camera. Making use of coherent beam behaving as a carrier wave interference pattern will form over a TV monitor. Experimental results of interference images from the TV screen are photographed showing the validity of the technique.

Citation Download Citation

H. El-Ghandoor and A. M. Hamed "Strain Analysis Using TV Speckle Interferometer", Proc. SPIE 0863, Industrial Optoelectronic Measurement Systems Using Coherent Light, (1 June 1988); https://doi.org/10.1117/12.943500

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