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Proceedings Paper

Wavefront-sensorless aberration correction of extended objects using a MEMS deformable mirror
Author(s): L. P. Murray; J. C. Dainty; J. Coignus; F. Felberer
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Paper Abstract

The original proposal of wavefront-sensorless aberration correction was suggested by Muller and Buffington[1]. In this technique we attempt to correct for wavefront aberrations without the use of conventional wavefront sensing. We apply commands to a corrective element with adjustable segments in an attempt to maximise a metric which correlates to image quality. We employ search algorithms to find the optimal combination of actuator voltages on a DM to maximise a certain sharpness metric. The "sharpness" is based on intensity measurements taken with a CCD camera. It has been shown that sharpness maximisation, using the simplex algorithm, can minimise the aberrations and restore the Airy rings of an imaged point source. This paper demonstrates that the technique can be applied to extended objects which have been aberrated using a Hamamatsu SLM to induce aberrations. The correction achieved using various search algorithms are evaluated and presented.

Paper Details

Date Published: 23 January 2006
PDF: 8 pages
Proc. SPIE 6113, MEMS/MOEMS Components and Their Applications III, 61130G (23 January 2006); doi: 10.1117/12.653415
Show Author Affiliations
L. P. Murray, National Univ. of Ireland/Galway (Ireland)
J. C. Dainty, National Univ. of Ireland/Galway (Ireland)
J. Coignus, National Univ. of Ireland/Galway (Ireland)
F. Felberer, National Univ. of Ireland/Galway (Ireland)

Published in SPIE Proceedings Vol. 6113:
MEMS/MOEMS Components and Their Applications III
Scot S. Olivier; Srinivas A. Tadigadapa; Albert K. Henning, Editor(s)

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