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26 April 2016 Wavefront shaping for flow-field measurements through varying phase boundaries
J. W. Czarske, N. Koukourakis, J. Koenig, B. Fregin, L. Büttner
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Proceedings Volume 9890, Optical Micro- and Nanometrology VI; 98900L (2016) https://doi.org/10.1117/12.2227052
Event: SPIE Photonics Europe, 2016, Brussels, Belgium
Abstract
We propose the usage of wavefront shaping approaches for image correlation based flow-field measurements. Aberrations introduced by a single phase boundary in the detection beam path were explored. Variations of the optical path-length result in strong errors in position allocation and thus to an enhancement of the measurement uncertainty of the velocity. Our results show that the usage of wavefront shaping enables to reduce these errors and to strongly improve the quality of image correlation based flow-field measurements. First experimental and simulated results underline the importance of these approaches.
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J. W. Czarske, N. Koukourakis, J. Koenig, B. Fregin, and L. Büttner "Wavefront shaping for flow-field measurements through varying phase boundaries", Proc. SPIE 9890, Optical Micro- and Nanometrology VI, 98900L (26 April 2016); https://doi.org/10.1117/12.2227052
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KEYWORDS
Adaptive optics
Wavefronts
Wavefronts
Particles
Phase measurement
Spatial light modulators
Spatial light modulators
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