An ultra fast, ultra compact sensor for diffuse wave spectroscopy

K. Barjean; D. Ettori; E. Tinet; A. Dupret; M. Vasiliu; J.-M. Tualle

doi:10.1117/12.2006376

19 February 2013 An ultra fast, ultra compact sensor for diffuse wave spectroscopy

K. Barjean, D. Ettori, E. Tinet, A. Dupret, M. Vasiliu, J.-M. Tualle

Proceedings Volume 8659, Sensors, Cameras, and Systems for Industrial and Scientific Applications XIV; 865906 (2013) https://doi.org/10.1117/12.2006376
Event: IS&T/SPIE Electronic Imaging, 2013, Burlingame, California, United States

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.

Citation Download Citation

K. Barjean, D. Ettori, E. Tinet, A. Dupret, M. Vasiliu, and 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); https://doi.org/10.1117/12.2006376

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