Influence of some recording parameters on digital holography particle image velocimetry
Zhang, Yonggang and Shen, Gongxin and Schröder, Andreas and Kompenhans, Jürgen (2005) Influence of some recording parameters on digital holography particle image velocimetry. Optical Engineering, Vol. 45 (7), . Spie - The Journal of The International Society for Optical Engineering. DOI: 10.1117/1.2227074.
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Digital holographic particle image velocimetry (DHPIV) is a promising technique for the measurement of the instantaneous flow velocity within a volume of the flow. Besides problems at illumination and recording which need to be solved, one major issue is, is how to extract the information about the location of the particles within the flow and their displacement between two illuminations out of the storage medium, i.e. the digital hologram. Some recording parameters such as the recording distance z<sub>0</sub>, particle size d<sub>p</sub>, wavelength λ, the size of the CCD chip H, the pixel size d<sub>pixel</sub> and the particle concentration c<sub>p</sub> etc, will considerably affect the results of the reconstruction, and may even determine the success or failure of a measurement. This paper discusses the influence of these parameters and presents a formula for the critical recording distance. The numerical simulations indicate that when the recording distance is near to the critical recording distance, the results of the reconstruction are much better than those obtained far away from the critical recording distance, especially for high particle concentration. Also an experiment is made to validate the corresponding analysis.
|Additional Information:||published online: July 20, 2006|
|Title:||Influence of some recording parameters on digital holography particle image velocimetry|
|Journal or Publication Title:||Optical Engineering|
|In ISI Web of Science:||Yes|
|Publisher:||Spie - The Journal of The International Society for Optical Engineering|
|Keywords:||digital holography, in-line holography, particle image velocimetry|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L VU - Air Traffic and Environment|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L AR - Aircraft Research|
|DLR - Research theme (Project):||L - Air Traffic and Weather (old)|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology > Experimental Methods|
|Deposited By:||Ilka Micknaus|
|Deposited On:||30 Oct 2006|
|Last Modified:||14 Jan 2010 20:24|
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