1 March 1991 Detection of the object velocity using the time-varying scattered speckles
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The dynamic properties of doubly-scattered speckles produced at the image plane have been investigated by using a scattering model consisting of a coherent Gaussian beam, a cascade of two moving diffusers and a single imaging lens. It is found that, when the point-spread function and the focal position of the lens satisfy certain conditions, three kinds of velocity information, i.e., the velocity of each diffuser, the average velocity of the diffusers, and the velocity difference between the diffusers, can be obtained by measuring a temporal correlation length of the time-varying speckle intensity. Experimental results confirm the theoretical predictions.
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Takashi Okamoto, Takashi Okamoto, Toshimitsu Asakura, Toshimitsu Asakura, } "Detection of the object velocity using the time-varying scattered speckles", Proc. SPIE 1399, Optical Systems in Adverse Environments, (1 March 1991); doi: 10.1117/12.26103; https://doi.org/10.1117/12.26103

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