Abstract
Digital holographic particle image velocimetry is a promising technique for the measurement of the instantaneous flow velocity within a volume of a flow. It poses, however—problems of illumination and recording—the major problem of how to extract the information about the location of the particles within the flow and their displacement between two illuminations from the storage medium, i.e., the digital hologram. Various recording parameters, such as the recording distance, the particle size, the wavelength, the size of the CCD chip, the pixel size, and the particle concentration, 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. Numerical simulations indicate that when the recording distance is near to the critical value, the results of the reconstruction are much better than those obtained far away from it, especially for high particle concentration. An experiment has also been made to validate the analysis.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
