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Proceedings Paper

Enhancement of lateral resolution of Fourier domain optical coherence tomography over diffraction-limit by defocus-detection and numerical compensation
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Paper Abstract

A method of lateral superresolution for Fourier domain optical coherence tomography is presented. This method consists of intentional defocus and its numerical compensation using a spatial frequency- phase filter. The designing process of the phase filter is described, and the superresolution effect is discussed theoretically. Experimental results of a knife-edge test prove that the frequency filter enhances the lateral resolution better than a diffraction-limited resolution. This method is applied to the investigation of an in vivo human iris and shows the effect of the cancellation of defocus.

Paper Details

Date Published: 20 February 2006
PDF: 6 pages
Proc. SPIE 6079, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine X, 607918 (20 February 2006); doi: 10.1117/12.648344
Show Author Affiliations
Yoshiaki Yasuno, Univ. of Tsukuba (Japan)
Jun-ichiro Sugisaka, Univ. of Tsukuba (Japan)
Yusuke Sando, Univ. of Tsukuba (Japan)
Yoshifumi Nakamura, Univ. of Tsukuba (Japan)
Shuichi Makita, Univ. of Tsukuba (Japan)
Takashi Endo, Univ. of Tsukuba (Japan)
Masahide Itoh, Univ. of Tsukuba (Japan)
Toyohiko Yatagai, Univ. of Tsukuba (Japan)

Published in SPIE Proceedings Vol. 6079:
Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine X
Valery V. Tuchin; Joseph A. Izatt; James G. Fujimoto, Editor(s)

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