Phase estimation for global defocus correction in optical coherence tomography

Mikkel Jensen; Niels M. Israelsen; Adrian Podoleanu; Ole Bang

doi:10.1117/12.2292547

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5 March 2018 Phase estimation for global defocus correction in optical coherence tomography

Mikkel Jensen, Niels M. Israelsen, Adrian Podoleanu, Ole Bang

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Proceedings Volume 10591, 2nd Canterbury Conference on OCT with Emphasis on Broadband Optical Sources; 105910Q (2018) https://doi.org/10.1117/12.2292547
Event: Second Canterbury Conference on Optical Coherence Tomography, 2017, Canterbury, United Kingdom

Abstract

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.

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Mikkel Jensen, Niels M. Israelsen, Adrian Podoleanu, and Ole Bang "Phase estimation for global defocus correction in optical coherence tomography", Proc. SPIE 10591, 2nd Canterbury Conference on OCT with Emphasis on Broadband Optical Sources, 105910Q (5 March 2018); https://doi.org/10.1117/12.2292547

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