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Phase estimation for global defocus correction in optical coherence tomography

Jensen, Mikkel and Israelsen, Niels M. and Podoleanu, Adrian and Bang, Ole (2018) Phase estimation for global defocus correction in optical coherence tomography. In: Podoleanu, Adrian G.H. and Bang, Ole, eds. 2nd Canterbury Conference on OCT with Emphasis on Broadband Optical Sources. Proceedings of SPIE . SPIE. ISBN 978-1-5106-1674-5. E-ISBN 978-1-5106-1675-2. (doi:10.1117/12.2292547) (KAR id:66362)

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In this work we investigate three techniques for estimation of the non-linear phase present due to defocus in optical coherence tomography, and apply them with the angular spectrum method. The techniques are: Least squares fitting the of unwrapped phase of the angular spectrum, iterative optimization, and sub-aperture correlations. The estimated phase of a single en-face image is used to extrapolate the non-linear phase at all depths, which in the end can be used to correct the entire 3-D tomogram, and any other tomogram from the same system.

Item Type: Book section
DOI/Identification number: 10.1117/12.2292547
Uncontrolled keywords: Optical coherence tomography, angular spectrum method, defocus correction
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Adrian Podoleanu
Date Deposited: 13 Mar 2018 12:25 UTC
Last Modified: 24 Jul 2019 09:24 UTC
Resource URI: (The current URI for this page, for reference purposes)
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