Defocus test and defocus correction in full-field optical coherence tomography.
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.
Labiau
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Institut Langevin, Ecole Supérieure de Physique et de Chimie Industrielles, CNRS UMR 7587, Laboratoire d'Optique Physique, 10 rue Vauquelin, 75231 Paris Cedex 05, France.
David
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Gigan
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Boccara
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D005583:Fourier Analysis; D007089:Image Enhancement; D008198:Lymph Nodes; D041623:Tomography, Optical Coherence / Q000379:methods*; D014867:Water
D014867:Water