Theoretical analysis of complex-conjugate-ambiguity suppression in frequency-domain optical-coherence tomography

New phase-shifting techniques have recently been proposed to suppress the complex-conjugate ambiguity in frequency-domain optical-coherence tomography. A phase shift is introduced, in an elegant fashion, by incorporating a small beam offset at the scanning mirror. The tomogram is then computed by using a combination of Hilbert and Fourier transforms. This is a marked deviation from the conventional approaches, wherein each A-scan is reconstructed independently of the others. In this paper, we formulate the problem in a signal processing framework and provide theoretical proofs for maximal and partial suppression of complex-conjugate ambiguity. To supplement the theoretical derivations, we provide experimental results on in vivo measurements of a human finger nail.

Published in:
2008 Ieee International Symposium On Biomedical Imaging: From Nano To Macro, Vols 1-4, 396-399
Presented at:
5th IEEE International Symposium on Biomedical Imaging - From Nano to Macro, Paris, FRANCE, May 14-17, 2008
Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa

 Record created 2010-11-30, last modified 2018-03-17

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