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Demonstration of real-time depth-resolved Shack-Hartmann measurements

Wang, J., Podoleanu, Adrian G.H. (2012) Demonstration of real-time depth-resolved Shack-Hartmann measurements. Optics Letters, 37 (23). pp. 4862-4864. ISSN 0146-9592. (doi:10.1364/OL.37.004862) (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)

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. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1364/OL.37.004862

Abstract

Shack-Hartmann wavefront sensors (SH-WFS) have little sensitivity in depth and hence are unsuitable for microscopy and are limited for retinal imaging. We demonstrate the first direct Shack-Hartmann measurement of wavefront originating from a multiple-layer target, in the presence of significant stray reflections that render a standard SH-WFS inoperable. A coherence-gate SH-WFS is implemented by adding time-domain low-coherence reflectometry gating to an SH-WFS configuration. The depth resolution is determined by the operational depth selection of the coherence gate, much narrower than the depth range of the SH-WFS. Five distinctive wavefronts are measured from five layers of a multiple-layer target. This paves the way toward depth-resolved wavefront sensing, which can significantly improve adaptive optics closed loops applied to microscopy and imaging of the retina. © 2012 Optical Society of America.

Item Type: Article
DOI/Identification number: 10.1364/OL.37.004862
Additional information: This is available as OPEN ACCESS by clicking on the URL.
Uncontrolled keywords: Closed loops, Depth range, Depth resolution, Depth-resolved, Low-coherence, Reflectometry, Retinal imaging, Shack-Hartmann, Shack-Hartmann wavefront sensors, Stray reflections, Time domain, Wave-front sensing, Wavefronts, Electric appliances
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 10:55 UTC
Last Modified: 29 May 2019 14:48 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49366 (The current URI for this page, for reference purposes)
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