Suppressing low-order eigenmodes with local control for deformable mirrors
Författare
Summary, in English
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. (c) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.OE.51.2.026601]
Avdelning/ar
Publiceringsår
2012
Språk
Engelska
Publikation/Tidskrift/Serie
Optical Engineering
Volym
51
Issue
2
Fulltext
Dokumenttyp
Artikel i tidskrift
Förlag
SPIE
Ämne
- Astronomy, Astrophysics and Cosmology
Nyckelord
- distributed control
- adaptive optics
- large deformable mirror
- dimensionless mode analysis
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0091-3286