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Full-field optical coherence tomography by two-dimensional heterodyne detection with a pair of CCD cameras
1Japan Science and Technology Corporation, Regional Joint Research Project of Yamagata Prefecture, 2-2-1 Matsuei, Yamagata, Yamagata 990-2473, Japan. akiba@ckk.ymgt-techno.or.jp
Abstract:
A two-dimensional heterodyne detection technique based on the frequency-synchronous detection method [Jpn. J. Appl. Phys. 39, 1194 (2000)] is demonstrated for full-field optical coherence tomography. This technique, which employs a pair of CCD cameras to detect the in-phase and quadrature components of the heterodyne signal simultaneously, offers the advantage of phase-drift suppression in interferometric measurement. Horizontal cross-sectional images are acquired at the rate of 100 frames/s in a single longitudinal scan, with a depth interval of 6 microm, making the rapid reconstruction of three-dimensional images possible.