Journal
OPTICS LETTERS
Volume 27, Issue 13, Pages 1126-1128Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.27.001126
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Optical coherence microscopy (OCM) is capable of imaging the backscattering potential of a sample with high transversal and axial resolution. We report on a combination of OCM with a differential phase-contrast technique that permits imaging of the subwavelength optical path differences that occur between a narrow beam probing a sample and its surrounding. This technique allows small transversal refractive-index variations close to a selected interface to be seen. We report on the method and present first images of a test sample and a single cell layer. The cells act as phase objects; imaging the phase properties improves the contrast compared with that of intensity images. (C) 2002 Optical Society of America.
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