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From talbot bands to no mirror terms in fourier domain OCT, a quest on the fundamental origin of the sensitivity decay with depth

Podoleanu, A.G., Woods, D., Hughes, M. (2009) From talbot bands to no mirror terms in fourier domain OCT, a quest on the fundamental origin of the sensitivity decay with depth. In: ARRAY(0x7f1293d295c0), San Jose, CA. (doi:10.1117/12.808327) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1117/12.808327

Abstract

We show that the decay of sensitivity with depth in Fourier Domain (FD)-OCT can be explained based on the superposition of wavetrain lengths after dispersion (diffraction). The more coherent the dispersed waves are, the slower the decay of sensitivity. An asymmetry in the decay curve with the optical path difference (OPD) can be introduced via an "intrinsic" delay which has the effect of shifting axially the two wavetrains relative to each other, originating from the object and reference beam of an interferometer. In this way, an equivalent Talbot Bands set-up is implemented, characterized by no mirror terms for the "extrinsic" delay introduced in the interferometer. Such configurations require that the two interfering beams use different parts of the diffraction grating in the interrogating spectrometer. Theory of Talbot Bands is presented and then how this knowledge can be transferred to the field of FD-OCT to achieve A-scans mirror terms free in one step. A theoretical rigorous model and a heuristic model are presented to quantify the Talbot bands. © 2009 SPIE.

Item Type: Conference or workshop item (Proceeding)
DOI/Identification number: 10.1117/12.808327
Additional information: Unmapped bibliographic data: C7 - 71681L [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Progr. Biomed. Opt. Imaging Proc. SPIE [Field not mapped to EPrints] AD - Applied Optics Group, School of Physical Sciences, University of Kent, CT2 7NH, Canterbury, United Kingdom [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints] C3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE [Field not mapped to EPrints]
Uncontrolled keywords: Mirror terms, Optical coherence tomography, Talbot Bands, Decay curves, Fourier domains, Fourier-domain OCT, Heuristic models, Interfering beams, One steps, Optical coherence tomography, Optical path differences, Reference beams, Rigorous models, Talbot Bands, Wave trains, Diffraction, Finite difference method, Interferometers, Interferometry, Mirrors, Optical tomography, Tomography, Coherent light
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical coherence tomography
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 14 Jul 2015 08:23 UTC
Last Modified: 29 May 2019 14:50 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49470 (The current URI for this page, for reference purposes)
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