17 August 1999 Implementation of compensation speckle interferometry for high-precision determination of material mechanical properties
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Proceedings Volume 3745, Interferometry '99: Applications; (1999) https://doi.org/10.1117/12.357775
Event: International Conference on Optical Metrology, 1999, Pultusk Castle, Poland
Abstract
The paper contains a brief description of main principles of compensation speckle interferometric technique with an emphasis is made on their implementing in non-traditional fields of material testing. The main essence of optical compensation consists of the fact that routine quantitative interpretation of fringe patterns is substituted with more accurate measuring the geometrical parameters of the interferometer set up corresponding to the compensation instants. Metrological basis of this system is the electronic speckle pattern interferometer combining two speckle fields with both an object and a reference speckle pattern is created by a ground glass diffuser. A visualization of fringe patterns related to a small difference between two deflection fields of plane specimen under pure bending is performed by digital subtraction of corresponding intensity fields derived from CCD-camera. Some examples of Poisson's ratio and elasticity modulus determination for composite materials and their evolution due to internal humidity level changing are also presented.
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Igor N. Odintsev, Andrey A. Apalkov, Vladimir S. Pisarev, "Implementation of compensation speckle interferometry for high-precision determination of material mechanical properties", Proc. SPIE 3745, Interferometry '99: Applications, (17 August 1999); doi: 10.1117/12.357775; https://doi.org/10.1117/12.357775
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