Extending axial focus of optical coherence tomography using parallel multiple aperture synthesis

Compromising the inherent trade-off between transverse resolution and depth of focus (DOF) remains a long-standing issue in optical coherence tomography (OCT). In this work, we report a novel technique-parallel multiple aperture synthesis (pMAS) to simultaneously generate multiple optical apertures...

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Bibliographic Details
Published in:Applied optics (2004) 2018-05, Vol.57 (13), p.3556
Main Authors: Bo, En, Ge, Xin, Yu, Xiaojun, Mo, Jianhua, Liu, Linbo
Format: Article
Language:English
Subjects:
Apertures
Microparticles
Optical Coherence Tomography
Synthesis
Tomography
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Summary:Compromising the inherent trade-off between transverse resolution and depth of focus (DOF) remains a long-standing issue in optical coherence tomography (OCT). In this work, we report a novel technique-parallel multiple aperture synthesis (pMAS) to simultaneously generate multiple optical apertures in an OCT sample arm by employing a two-surface coated mirror. In the proposed pMAS, the DOF is extended by a factor of 16.49 without sacrificing the transverse resolution for proof-of-concept experiments when multiple distinctive apertures are digitally synthesized. The microparticles and tissue experiments demonstrate the feasibility of pMAS to address the fundamental problem of limited DOF in high-resolution OCT.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.57.003556