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Direct en-face, speckle-reduced images using angular-compounded Master-Slave optical coherence tomography

Říha, René, Marques, Manuel Jorge M., Hughes, Michael R., Bradu, Adrian, Podoleanu, Adrian G.H. (2020) Direct en-face, speckle-reduced images using angular-compounded Master-Slave optical coherence tomography. Journal of Optics, 22 (5). ISSN 2040-8978. (doi:10.1088/2040-8986/ab8285) (KAR id:80671)

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https://doi.org/10.1088/2040-8986%2Fab8285

Abstract

In this paper, an angular compounding method to achieve speckle contrast reduction in optical coherence tomography (OCT) imaging is explored in detail. The angular compounding approach involves collecting multiple images at different angles of incidence, registering the images to correct for induced distortions, and then incoherently summing the images to reduce speckle. The method was experimentally demonstrated with a spectrometer-based Master-Slave enhanced OCT instrument capable of directly generating en-face images. We have investigated the impact of the angular range and number of averaged frames on the degree of speckle artefact reduction, as well as the effect on image resolution and sharpness. The minimum angular step necessary to secure a sufficiently small speckle pattern correlation between the images has also been determined, and the method has subsequently been validated on a biological sample (potato cells).

Item Type: Article
DOI/Identification number: 10.1088/2040-8986/ab8285
Uncontrolled keywords: optical coherence tomography, speckle reduction, angular compounding imaging, Master–Slave OCT, biological imaging
Subjects: Q Science
Q Science > QC Physics > QC355 Optics
Divisions: Divisions > Division of Natural Sciences > School of Physical Sciences
Depositing User: Adrian Podoleanu
Date Deposited: 31 Mar 2020 11:10 UTC
Last Modified: 22 Mar 2021 00:00 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/80671 (The current URI for this page, for reference purposes)
Marques, Manuel Jorge M.: https://orcid.org/0000-0002-7509-0704
Hughes, Michael R.: https://orcid.org/0000-0001-5301-2492
Bradu, Adrian: https://orcid.org/0000-0002-6890-1599
Podoleanu, Adrian G.H.: https://orcid.org/0000-0002-4899-9656
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