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

Abstract

We report experimental evidence and correction of defocus in full-field OCT of biological samples due 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.

7 pages, 3 figures, minor changes, 1 figure added