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. 2016 Sep 12;6:32702. doi: 10.1038/srep32702

Figure 2. Measurement of diffusion coefficients of Brownian particles using PCI.

Figure 2

(a) Quantitative phase image of 1 μm polystyrene beads in glycerol undergoing Brownian motion. (b) Correlation time map of the sample shown in a. (c) Histogram of the bandwidth values across the PCI map, band-passed around q0 = 8 rad/μm. The mean value is displayed using the vertical line. (d) Dispersion relation curve associated with the diffusive particles shown in a. The mean Γ value from c is shown by the horizontal line.