Unified system for holographic measurement in fluid and solid mechanics: use of the system for 3D displacement measurement on surfaces

Donald H. Barnhart; Victor S. S. Chan; Neil A. Halliwell; Jeremy M. Coupland

doi:10.1117/12.365740

13 October 1999 Unified system for holographic measurement in fluid and solid mechanics: use of the system for 3D displacement measurement on surfaces

Donald H. Barnhart, Victor S. S. Chan, Neil A. Halliwell, Jeremy M. Coupland

Author Affiliations +

Proceedings Volume 3783, Optical Diagnostics for Fluids/Heat/Combustion and Photomechanics for Solids; (1999) https://doi.org/10.1117/12.365740
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

This paper reports the use of a new holographic measurement system in the study of 3D surface displacements. Although equally applicable to fluid and solid mechanics, the aim of this report is to demonstrate the system's use in quantitative surface displacement measurements with a classical cantilever experiment, using a continuous-wave diode-pumped YAG laser system. The reported results exhibit an accuracy corresponding to other interferometric systems, but with a much larger displacement range. The measurement system employs a novel optical image shifting method to eliminate the problem of directional ambiguity. In addition, the reported system uses 3D complex correlation rather than 2D real correlation, thereby offering a direct method for measuring 3D displacement in 3D space. FInally, with the novel use of an optical fiber to probe the recorded holographic image space, it is found to be a simple matter to directly obtain 3D displacement measurements at precisely known surface locations.

Citation Download Citation

Donald H. Barnhart, Victor S. S. Chan, Neil A. Halliwell, and Jeremy M. Coupland "Unified system for holographic measurement in fluid and solid mechanics: use of the system for 3D displacement measurement on surfaces", Proc. SPIE 3783, Optical Diagnostics for Fluids/Heat/Combustion and Photomechanics for Solids, (13 October 1999); https://doi.org/10.1117/12.365740

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