1 July 2004 Speckle averaging for optical coherence tomography by vibration of a thin water film
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Abstract
A novel method for reducing the appearance of speckle within a single image acquisition in optical coherence tomography is presented. Local variations in the optical path length of beamlets within the beam diameter are introduced by vibrating a thin water film placed in a collimated section of the sample arm beam path. Consequent averaging of small numbers of adjacent depth scans results in a reduced appearance of speckle with no change in the axial point spread function. Reduced speckle images of a layered agar sample and thin reflective surfaces are shown.
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B. Hyle Park, Mark C. Pierce, Barry Cense, Johannes F. de Boer, "Speckle averaging for optical coherence tomography by vibration of a thin water film", Proc. SPIE 5316, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine VIII, (1 July 2004); doi: 10.1117/12.531400; https://doi.org/10.1117/12.531400
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