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Velocity measurement of the diffuse object based on time-differentiated speckle intensity fluctuations |
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| Authors: | N. Takai T. Iwai T. Ushizaka T. Asakura |
| Affiliation: | Research Institute of Applied Electricity, Hokkaido University, Sapporo, Hokkaido, Japan |
| Abstract: | This paper proposes a new velocity measuring method for a moving diffuse object on the basis of the autocorrelation of time-differentiated speckle intensity fluctuations. The theoretical background and experimental verification of this method are given. The correlation length of time-differentiated speckle intensity fluctuations is defined by the point at which the correlation becomes zero. By means of the correlation length the object velocity is found to be accurately measured. |
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