Tuohy, S. and Podoleanu, A.G.H. (2010) Depth-Resolved Wavefront Aberrations using a Coherence-Gated Shack-Hartmann Wavefront Sensor. Optics Express, 18 (4). pp. 3458-3476. ISSN 1094-4087.
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| Official URL http://dx.doi.org/10.1364/OE.18.003458 |
Abstract
In the present paper we investigate the possibility of narrowing the depth range of a physical Shack - Hartmann (SH) wavefront sensor (WFS) by using coherence gating. For the coherence gating, two low coherence interferometry (LCI) methods are evaluated and proof of principle configurations demonstrated: (i) a time domain LCI method based on phase shifting interferometry and (ii) a spectral domain LCI method, based on tuning a narrow band optical source. The two configurations are used to demonstrate each, the possibility of constructing a coherence gated (CG) SH/WFS. It is shown that these configurations produce spot patterns similar to those provided by a conventional SH/WFS. The two proof of principle configurations are also used to illustrate elimination of stray reflections in the interface optics which normally disturb the operation of conventional SH/WFSs. The speed and noise performance of the two CG-SH/WFS implementations are discussed.
| Item Type: | Article |
|---|---|
| Uncontrolled keywords: | Ophthalmology; Optical coherence tomography; Medical optics instrumentation; Adaptive Optics; Microscopy |
| Subjects: | R Medicine > RE Ophthalmology |
| Divisions: | Faculties > Science Technology and Medical Studies > School of Physical Sciences > Optics |
| Depositing User: | Jenny Harries |
| Date Deposited: | 20 Aug 2012 09:41 |
| Last Modified: | 28 Aug 2012 11:23 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/30208 (The current URI for this page, for reference purposes) |
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