Some applications of a HOE-based desensitized interferometer in materials research

Pierre Michel Boone; Pierre M. Jacquot

doi:10.1117/12.49573

1 December 1991 Some applications of a HOE-based desensitized interferometer in materials research

Pierre Michel Boone, Pierre M. Jacquot

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.49573
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

A holographic method suited for the measurement of flatness deviation is presented. This method takes advantage of the basic Fizeau arrangement usually meant for contouring analysis of relatively flat bodies. A desensitized interferometer is described allowing the measurement of rough objects, as frequently encountered in engineering practice. The key component of this interferometer is a diffractive optical element produced by recording two-wave interference patterns. Desensitization factors ranging from 1 to 100 with respect to a Fizeau interferometer can be achieved. Flatness checks of computer disks demonstrate the possibilities of the interferometer; deformation measurements performed with the desensitized interferometer on classical experimental mechanics specimens are presented: static testing on notched C-rings and on welds, and fatigue testing on notched three-point bend tests.

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Pierre Michel Boone and Pierre M. Jacquot "Some applications of a HOE-based desensitized interferometer in materials research", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.49573

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