Correction of geometric and refractive image distortions in optical coherence tomography applying Fermat's principle.

@article{Westphal2002CorrectionOG,
  title={Correction of geometric and refractive image distortions in optical coherence tomography applying Fermat's principle.},
  author={Volker Westphal and Andrew M. Rollins and Sunita Radhakrishnan and Joseph A. Izatt},
  journal={Optics express},
  year={2002},
  volume={10 9},
  pages={397-404}
}
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. 

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