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

Discontinued Devices LC-R 3000 Spatial Light Modulators
Adaptive Optics / Wavefront Control Microscopy
Published on:
Authors: Amanda J. Wright, Brett A. Patterson, Simon P. Poland, John M. Girkin, Graham M. Gibson, and Miles J. Padgett
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.”

Open Access

Publication: Optics Express
Issue/Year: Optics Express, Vol. 14, Issue 1, pp. 222-228, 2006
DOI: 10.1364/OPEX.14.000222
Link: https://doi.org/10.1364/OPEX.14.000222

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