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Influence of dark current to in-line digital holography

Zhang, Yonggang and Shen, Gongxin and Schröder, Andreas and Kompenhans, Jürgen (2006) Influence of dark current to in-line digital holography. Optimage Ltd., Edinburgh, UK. 12th International Symposium on Flow Visualization (ISFV12), 2006-09-10 - 2006-09-14, Göttingen, Germany. ISBN 0-9533991-8-4

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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. But some physical recording parameters (such as the wavelength, the particle size, the recording distance, etc.) and the characteristic parameters of the CCD camera (i.e. full factor, CCD size, pixel size, dark current level,etc.) will considerably affect the reconstructed result of the particle field. This paper gives the influence mode of the CCD camera’s dark current to digital holography, and detailedly discusses its influence to in-line digital holography, especially to the particle field holography. The numerical simulation indicates that there is no influence with homogeneous dark current distribution because it only acts as a proportional attenuator to reduce the incidence intensity on the CCD chip. But the influence will increase with increasing the amplitude and inhomogeneousness of the dark current level, especially for high particle concentration. At the same time, the paper gives the corresponding error evaluation of the reconstructed particle field under different dark current level.

Item URL in elib:https://elib.dlr.de/44845/
Document Type:Conference or Workshop Item (Paper, Poster)
Title:Influence of dark current to in-line digital holography
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Zhang, YonggangBeijing University of Aeronautics and Astronautics, Institute of Fluid Mechanics, ChinaUNSPECIFIED
Shen, GongxinBeijing University of Aeronautics and Astronautics, Institute of Fluid Mechanics, ChinaUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-8
Publisher:Optimage Ltd., Edinburgh, UK
Series Name:CD Rom Proceedings
Keywords:Dark Current, Digital Holography, in-line, Particle Image Velocimetry
Event Title:12th International Symposium on Flow Visualization (ISFV12)
Event Location:Göttingen, Germany
Event Type:international Conference
Event Dates:2006-09-10 - 2006-09-14
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:30 Oct 2006
Last Modified:27 Apr 2009 13:06

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