EN-FACE COHERENCE IMAGING USING GALVANOMETER SCANNER MODULATION

We introduce a novel optical path-modulation technique for a low-coher ence interferometric imaging system based on transverse scanning of th e target with a galvanometric scanning-mirror pair. The path modulatio n arises when the beam that is incident upon one of the scanning mirro rs does not fall on its axis of rotation. The method is demonstrated b y the production of en-face low-coherence images of different objects such as a fiber-optic tip and a human retina in vivo. (C) 1998 Optical Society of America. OCIS codes: 110.4500, 030.1640, 120.3180.