Vol. 2, issue 02, article # 5

pdf Ivanov A. P., Kolesnik A. I. Signal-to-noise ratio of pulsed optical sounding of targets throuhg a scattering medium.. // Atmospheric and oceanic optics. 1989. V. 2. No. 02. P. 113-119.
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Signal-to-noise ratio (SNR) at pulse light sensing of objects in a turbid medium is theoretically studied in accordance with primary optical charac-teristics, receiver-transmitter parameters, noise type and external background. The calculations are made within the scope of the small-angle diffusion approximation, allowing for temporal broadening of light pulses in the turbid medium. The contributions of different noise and its effect on SNR d are found as a function of distance. At the real pulse power degradation of d is shown to be due to the decrease of energy transfer ratio, and at a considera-bly high power - to the decrease of recorded contrast. In the former case, d is strongly dependent on the single scattering albedo, and in the latter case it is strongly dependent on the phase function asymmetry. Simple formulas useful for practical calculations of d are derived for extreme cases of small and large distances.


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