
Proceedings Paper
A model-based approach to wavefront sensorless adaptive opticsFormat | Member Price | Non-Member Price |
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Paper Abstract
In some adaptive optics systems the aberration is determined not using a wave front sensor but by sequential
optimization of the adaptive correction element. Efficient schemes for the control of such systems are essential if
they are to be effective. One of the simplest implementations of adaptive optics requires an adaptive correction
element and a single photodetector. Aberration measurement is performed by the sequential application of
chosen aberrations in order to maximise the detector signal. These wave front sensorless adaptive optics systems
have been demonstrated in many applications, which have included confocal microscopy, intra-cavity aberration
correction for lasers, fibre coupling and optical trapping. We develop appropriate mathematical models that
lead to direct maximisation algorithms with good convergence properties and that permit the measurement of
N modes with only N + 1 measurements. A scheme is introduced that permits the efficient measurement of
large amplitude wavefront aberrations. This scheme uses an optimization metric based upon root-mean-square
spot radius and an aberration expansion using polynomials suited to the representation of lateral aberrations.
The geometrical optics basis means that the scheme can be extended to arbitrarily large aberrations. We also
describe a general scheme for such wave front sensorless algorithms and relate various methods to this general
scheme.
Paper Details
Date Published: 9 February 2007
PDF: 11 pages
Proc. SPIE 6467, MEMS Adaptive Optics, 64670J (9 February 2007); doi: 10.1117/12.701850
Published in SPIE Proceedings Vol. 6467:
MEMS Adaptive Optics
Scot S. Olivier; Thomas G. Bifano; Joel A. Kubby, Editor(s)
PDF: 11 pages
Proc. SPIE 6467, MEMS Adaptive Optics, 64670J (9 February 2007); doi: 10.1117/12.701850
Show Author Affiliations
Martin J. Booth, Univ. of Oxford (United Kingdom)
Published in SPIE Proceedings Vol. 6467:
MEMS Adaptive Optics
Scot S. Olivier; Thomas G. Bifano; Joel A. Kubby, Editor(s)
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