Performance evaluation of a radial in-plane digital speckle pattern interferometer using a diffractive optical element for residual stress measurement

A. Albertazzi Jr.; M. R. Viotti; W. A. Kapp

doi:10.1117/12.861153

2 August 2010 Performance evaluation of a radial in-plane digital speckle pattern interferometer using a diffractive optical element for residual stress measurement

A. Albertazzi Jr., M. R. Viotti, W. A. Kapp

Author Affiliations +

Proceedings Volume 7791, Interferometry XV: Applications; 77910G (2010) https://doi.org/10.1117/12.861153
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

A digital speckle pattern (DSP) interferometer using a special diffractive optical element (DOE) was developed by the authors. A collimated laser beam is diffracted by the DOE in such a way that the first diffraction orders produce a circular double illuminated measurement area. Due to natural symmetry of the illumination scheme, the interferometer reaches pure radial in-plane sensitivity. It is demonstrated and verified that the resulting interferometer is not sensitive to laser wavelength variations at all. Its configuration is presented as well as its performance evaluation for residual stress measurements using the blind hole-drilling method.

Citation Download Citation

A. Albertazzi Jr., M. R. Viotti, and W. A. Kapp "Performance evaluation of a radial in-plane digital speckle pattern interferometer using a diffractive optical element for residual stress measurement", Proc. SPIE 7791, Interferometry XV: Applications, 77910G (2 August 2010); https://doi.org/10.1117/12.861153

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