Towards model-based adaptive optics optical coherence tomography

The transfer function for optical wavefront aberrations in single-mode fiber based optical coherence tomography is determined. The loss in measured OCT signal due to optical wavefront aberrations is quantified using Fresnel propagation and the calculation of overlap integrals. A distinction is made...

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Bibliographic Details
Published inOptics express Vol. 22; no. 26; pp. 32406 - 32418
Main Authors Verstraete, Hans R G W, Cense, Barry, Bilderbeek, Rolf, Verhaegen, Michel, Kalkman, Jeroen
Format Journal Article
LanguageEnglish
Published United States 29.12.2014
Subjects
Algorithms
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Feedback
Image Enhancement - instrumentation
Lenses
Light
Models, Theoretical
Scattering, Radiation
Tomography, Optical Coherence - instrumentation
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Summary:The transfer function for optical wavefront aberrations in single-mode fiber based optical coherence tomography is determined. The loss in measured OCT signal due to optical wavefront aberrations is quantified using Fresnel propagation and the calculation of overlap integrals. A distinction is made between a model for a mirror and a scattering medium model. The model predictions are validated with measurements on a mirror and a scattering medium obtained with an adaptive optics optical coherence tomography setup. Furthermore, a one-step defocus correction, based on a single A-scan measurement, is derived from the model and verified. Finally, the pseudo-convex structure of the optical coherence tomography transfer function is validated with the convergence of a hill climbing algorithm. The implications of this model for wavefront sensorless aberration correction are discussed.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.22.032406