19 February 2013 An ultra fast, ultra compact sensor for diffuse wave spectroscopy
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Abstract
Diffuse Correlation Spectroscopy (DCS) is based on the temporal correlations of the speckle pattern from the light that has diffused through a biological media. Measurements must be made on a small coherence area of the size of a speckle grain. Summing independent measurement increases the SNR as the square root of the number of detectors. We present a bi-dimensionnal pixel CMOS detector array specially designed for this task, with parallel in-pixel demodulation and temporal correlations computation. Optical signals can be processed at a rate higher than 10,000 samples per second with demodulation frequencies in the MHz range.
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K. Barjean, K. Barjean, D. Ettori, D. Ettori, E. Tinet, E. Tinet, A. Dupret, A. Dupret, M. Vasiliu, M. Vasiliu, J.-M. Tualle, J.-M. Tualle, } "An ultra fast, ultra compact sensor for diffuse wave spectroscopy", Proc. SPIE 8659, Sensors, Cameras, and Systems for Industrial and Scientific Applications XIV, 865906 (19 February 2013); doi: 10.1117/12.2006376; https://doi.org/10.1117/12.2006376
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