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Demonstration of real-time depth-resolved Shack–Hartmann measurements |
Optics Letters, Vol. 37, Issue 23, pp. 4862-4864 (2012)
http://dx.doi.org/10.1364/OL.37.004862
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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
OCIS Codes
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.4470) Medical optics and biotechnology : Ophthalmology
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(180.0180) Microscopy : Microscopy
(110.1080) Imaging systems : Active or adaptive optics
ToC Category:
Atmospheric and Oceanic Optics
History
Original Manuscript: September 14, 2012
Revised Manuscript: October 18, 2012
Manuscript Accepted: October 21, 2012
Published: November 22, 2012
Virtual Issues
Vol. 8, Iss. 1 Virtual Journal for Biomedical Optics
Citation
Jingyu Wang and Adrian Gh. Podoleanu, "Demonstration of real-time depth-resolved Shack–Hartmann measurements," Opt. Lett. 37, 4862-4864 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-23-4862
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