Heterodyne detection of doppler signal of dynamic speckles by spaced photodetectors

Vyacheslav Aranchuk

doi:10.1117/12.230007

15 January 1996 Heterodyne detection of Doppler signal of dynamic speckles by spaced photodetectors

Vyacheslav Aranchuk

Proceedings Volume 2628, Optical and Imaging Techniques for Biomonitoring; (1996) https://doi.org/10.1117/12.230007
Event: BiOS Europe '95, 1995, Barcelona, Spain

Abstract

In this paper the heterodyning detection of the Doppler signal of dynamic speckles by spaced photodetectors is studied theoretically. The investigation is carried out on the assumption that the laser field scattered by the diffuse object is the Gaussian speckles and the signal processing is implemented by the maximum amplitude channel section. It is shown that the detection probability of Doppler signal by spaced photodetectors increases with the increase of detection probability P_D1 when only one photodetector is used. The spaced detection is practically effective for P_D1 approximately greater than 0.85. The detection probability value close to the theoretically attainable maximum value takes place when 4-5 spaced photodetectors are used.

Citation Download Citation

Vyacheslav Aranchuk "Heterodyne detection of Doppler signal of dynamic speckles by spaced photodetectors", Proc. SPIE 2628, Optical and Imaging Techniques for Biomonitoring, (15 January 1996); https://doi.org/10.1117/12.230007

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