TY - GEN
T1 - Theoretical and experimental studies of speckle noise in in-line holography of particle fields
AU - Meng, Hui
AU - Hussain, Fazle
AU - Anderson, Wallance L.
AU - Liu, David D.
PY - 1993
Y1 - 1993
N2 - In line holography of particle fields suffers from image deterioration caused by intrinsic speckle noise. A theoretical model for this process involving multiple particles is developed, which shows that the virtual image of the particle ensemble is the dominant source of speckle in reconstruction. We quantify the effect of the speckle with a signal-to-noise ratio (SNR), which is found to depend on a speckle parameter, embodying particle diameter, concentration, and sample depth, and upon the film gamma. Experimental results show reasonably good agreement with our model. The SNR equation provides prediction of image quality and thence application limits of in-line holography for particle fields. The fundamental understanding obtained here points not only to constraints but also to possible improvements in holographic particle velocimetry (HPV) technique.
AB - In line holography of particle fields suffers from image deterioration caused by intrinsic speckle noise. A theoretical model for this process involving multiple particles is developed, which shows that the virtual image of the particle ensemble is the dominant source of speckle in reconstruction. We quantify the effect of the speckle with a signal-to-noise ratio (SNR), which is found to depend on a speckle parameter, embodying particle diameter, concentration, and sample depth, and upon the film gamma. Experimental results show reasonably good agreement with our model. The SNR equation provides prediction of image quality and thence application limits of in-line holography for particle fields. The fundamental understanding obtained here points not only to constraints but also to possible improvements in holographic particle velocimetry (HPV) technique.
UR - http://www.scopus.com/inward/record.url?scp=0027297442&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0027297442
SN - 0791809560
T3 - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
SP - 57
EP - 65
BT - Holographic Particle Image Velocimetry
PB - Publ by ASME
Y2 - 20 June 1993 through 24 June 1993
ER -