Open AccessCorrection of geometric and refractive image distortions in optical coherence tomography applying Fermat�??s principle
Author(s) -
Volker Westphal,
Andrew M. Rollins,
R. Sudhakar,
Joseph A. Izatt
Publication year - 2002
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.10.000397
Subject(s) - optics , optical coherence tomography , fermat's last theorem , coherence (philosophical gambling strategy) , refraction , refractive index , diffraction , residual , physics , computer science , mathematics , algorithm , discrete mathematics , quantum mechanics
We describe a methodology for quantitative image correction in OCT which includes procedures for correction of nonlinear axial scanning and non-telecentric scan patterns, as well as a novel approach for refraction correction in layered media based on Fermat's principle. The residual spatial error obtained in layered media with a fan-beam hand-held probe was reduced from several hundred micrometers to near the diffraction and coherence-length limits.