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. Author manuscript; available in PMC: 2009 Feb 9.
Published in final edited form as: J Biomed Opt. 2008;13(5):054016. doi: 10.1117/1.2982529

Fig. 2.

Fig. 2

Laser speckle images of card paper obtained through (a) an angioscope, and (b) a leached optical fiber bundle. Images were obtained 100 ms apart during motion of the fiber bundles. One would expect the speckle pattern from the card paper to appear frozen in time with negligible speckle decorrelation. However, as shown in (a), even the slightest motion of the angioscope caused a significant modulation of the speckle pattern resulting from inter-fiber crosstalk due to light leakage between individual fiber cores. In contrast, in the leached fiber bundle in (b), bundle motion had a negligible effect in the temporal evolution of the speckle pattern due to low crosstalk between fibers.