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Dynamic closed-loop system for focus tracking using a spatial light modulator and a deformable membrane mirror

Wright, A.J. and Poland, S.P. and Patterson, B.A. and Girkin, J.M. and Gibson, G.M. and Padgett, M.J. (2006) Dynamic closed-loop system for focus tracking using a spatial light modulator and a deformable membrane mirror. Optics Express, 14 (1). pp. 222-228. ISSN 1094-4087

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Abstract

A dynamic closed-loop method for focus tracking using a spatial light modulator and a deformable membrane mirror within a confocal microscope is described. We report that it is possible to track defocus over a distance of up to 80 µm with an RMS precision of 57 nm. For demonstration purposes we concentrate on defocus, although in principle the method applies to any wavefront shape or aberration that can be successfully reproduced by the deformable membrane mirror and spatial light modulator, for example, spherical aberration.

Item type: Article
ID code: 4788
Keywords: atmospheric and oceanic optics, active or adaptive optics, microscopy, optical devices, mirrors, spatial light modulators, Optics. Light, Physics
Subjects: Science > Physics > Optics. Light
Science > Physics
Department: Faculty of Science > Institute of Photonics
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Depositing user: Strathprints Administrator
Date Deposited: 15 Nov 2007
Last modified: 16 Jul 2013 20:44
URI: http://strathprints.strath.ac.uk/id/eprint/4788

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