Swept-source coherence-gated Shack-Hartmann wavefront sensor

Wang, J. and Podoleanu, Adrian G.H. (2012) Swept-source coherence-gated Shack-Hartmann wavefront sensor. In: Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI. SPIE ISBN 978-0-8194-8856-5. (doi:https://doi.org/10.1117/12.908920) (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)

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Official URL
http://dx.doi.org/10.1117/12.908920

Abstract

In this report we investigate the possibility of narrowing the depth range of a physical Shack-Hartmann wavefront sensor (SH-WFS) using coherence gating technique in spectral domain. A time-domain low coherence interferometry (LCI) setup [1] has already been demonstrated capable of generating similar Shack-Hartmann spots pattern to that delivered by a conventional SH-WFS. Stray reflections are eliminated in the images due to a narrow coherence gating introduced by the interferometric technique. Hereby we present another approach by employing a wavelength tuneable light source to obtain Shack-Hartmann spot patterns with coherence gating in a 3D volume without axial scanning. Signal strength is enhanced in contrast with a conventional SH-WFS and signal to noise ratio is improved compared to the previous time-domain setup. This novel technique has the potential of providing depth resolved wavefront aberration information, which can guide better wavefront correction in adaptive optics assisted ophthalmology imaging and confocal microscopy instruments. © 2012 SPIE.

Item Type: Conference or workshop item (Proceeding)
Uncontrolled keywords: Coherence gating; Mach-Zehnder interferometer; Shack-Hartman wavefront sensor; Swept source
Subjects: Q Science > QC Physics
Q Science > QC Physics > QC355 Optics
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 16 Jul 2015 11:22 UTC
Last Modified: 21 Jul 2015 13:34 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49380 (The current URI for this page, for reference purposes)
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