1. Methods and arrangement for increasing contrast in optical coherence tomography by means of scanning an object with a dual beam

    In optical coherence tomography, a sectional image I(x,z) of an object is obtained in that a light beam scans the object along a x-line on the surface, and the depth z from which light of intensity I is reflected is measured by means of a partial-coherence interferometer. In so doing, a strong medium intensity can cover and conceal small differences in adjacent object points. The invention renders small differences in adjacent object points visible in that the object is illuminated by a dual beam which simultaneously illuminates the object at two adjacent points and whose two components are ...
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