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. Author manuscript; available in PMC: 2010 May 3.
Published in final edited form as: Opt Express. 2009 Jul 20;17(15):12285–12292. doi: 10.1364/oe.17.012285

Fig. 2.

Fig. 2

(a) Experimental setup. BS: beam splitter, GM: galvanometer mirrors, H: a holographic diffuser, S: sample, Condenser: Nikon 1.4NA, Camera: (Fastcam 1024 PCI, Photron), AOM1,2: acousto-optic modulators for temporal modulation of interference by shifting the frequency of the reference beam. (b–e) Averaged phase images where N is the number of speckle fields used for averaging. Scale bar indicates 5 μm and color bar indicates radian. (f) Standard deviation of phase noise as a function of the number of speckle fields used for averaging. Thin lines indicate the averaged phase for an area of 4×4 μm2 located outside of the sample. Thick line shows the averaged phase for 6 different areas.