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4. Conclusion
On-line digital holography enables the position and properties of small objects (particles, drops, bubbles, etc.) contained in a volume to be measured instantaneously, from a single recording. Measurements and visualizations carried out using this technique always include a recording phase and a reconstruction phase. Optical setups are simple and robust, essentially consisting of a laser source shaped to illuminate the measurement volume and a matrix sensor (CCD, CMOS) placed opposite. The recording phase is akin to conventional image acquisition, while the reconstruction phase involves digital processing of the hologram. Numerous reconstruction methods exist. The most conventional consist of reconstructing images by backpropagation calculation in a discrete set of planes at different distances from the sensor. The stack of images thus reconstructed must then be analyzed to detect particles,...
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Conclusion
Glossary
Bibliography
Websites
Online codes :
MATLAB code for online hologram simulation and reconstruction using the plane-wave spectrum method (Tatiana Latychevskaia and Hans-Werner Fink), https://www.mathworks.com/matlabcentral/fileexchange/59939-holography-with-plane-waves-inline-in-line...
Events
Congress:
Digital holography meeting applied to fluid metrology, five editions since 2010 – https://holophi5.sciencesconf.org/
Directory
Laboratories – Design offices – Schools – Research centers (non-exhaustive list)
The following is a non-exhaustive alphabetical list of French research teams using on-line digital holography for fluid mechanics measurements (laboratories working with off-axis fixtures are not listed).
COmplexe de Recherche Interprofessionnel en Aérothermochimie, UMR CNRS 6614
University...
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