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. 2014 Jun 10;4:5234. doi: 10.1038/srep05234

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(a) Single shot speckle pattern and corresponding I(q) averaged over 500 shots (inset). (b) Typical intensity autocorrelation g(R) and Lorentzian fit to determine the speckle size. Due to the finite size of the extracted region of interest no full decorrelation (g(R) − 1 = 0) can be observed.