Suppressing low-order eigenmodes with local control for deformable mirrors
Abstract
To improve the mechanical characteristics of actively controlled continuous faceplate deformable mirrors in adaptive optics, a strategy for reducing crosstalk between adjacent actuators and for suppressing low-order eigenmodes is proposed. The strategy can be seen as extending Saint-Venant's principle beyond the static case, for small local families of actuators. An analytic model is presented, from which we show the feasibility of the local control. Also, we demonstrate how eigenmodes and eigenfrequencies are affected by mirror parameters, such as thickness, diameter, Young's modulus, Poisson's ratio, and density. This analysis is used to evaluate the design strategy for a large deformable mirror, and how many actuators are needed within a family.
Additional Information
© 2012 Society of Photo-Optical Instrumentation Engineers. Paper 110410 received Apr. 26, 2011; revised manuscript received Dec. 4, 2011; accepted for publication Dec. 7, 2011; published online Mar. 7, 2012.Attached Files
Published - Heimsten2012p18060Opt_Eng.pdf
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Additional details
- Eprint ID
- 31430
- Resolver ID
- CaltechAUTHORS:20120511-103817734
- Created
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2012-05-11Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field