Defocus test and defocus correction in full-field optical coherence tomography.

@article{Labiau2009DefocusTA,
  title={Defocus test and defocus correction in full-field optical coherence tomography.},
  author={S Labiau and G. David and Sylvain Gigan and A. Claude Boccara},
  journal={Optics letters},
  year={2009},
  volume={34 10},
  pages={
          1576-8
        }
}
We report experimental evidence and correction of defocus in full-field optical coherence tomography of biological samples owing to mismatch of the refractive index of biological tissues and water. Via a metric based on the image quality, we demonstrate that we are able to compensate this index-induced defocus and to recover a sharp image in depth. 
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