Title :
Deformable mirror using magnetic membranes: application to adaptive optics in astrophysics
Author :
Divoux, C. ; Cugat, O. ; Reyne, G. ; Boussey-Said, J. ; Basrour, S.
Author_Institution :
Lab. d´´Electrotech., CNRS, Grenoble, France
fDate :
9/1/1998 12:00:00 AM
Abstract :
An alternative approach to more compact deformable mirrors for adaptive optics is developed. A thin and flexible reflective membrane is coated with a magnetic layer and locally deformed by the field created by an array of planar microcoils. This novel technology should enable higher resolution with smaller, lighter integrated mirrors. Several complementary modelling tools are used to study the electromagnetic, mechanical, magneto-mechanical and thermal behaviour of the device. A first prototype of Ø 30 mm mirror with a matrix of permanent magnets and an array of 25 microcoils is under construction
Keywords :
adaptive optics; astronomical telescopes; coils; magnetic devices; magnetic multilayers; membranes; mirrors; permanent magnets; 30 mm; adaptive optics; astrophysics; compact deformable mirrors; electromagnetic behaviour; local deformation; magnetic layer coating; magnetic membranes; magneto-mechanical behaviour; mechanical behaviour; modelling tools; permanent magnets matrix; planar microcoils array; thermal behaviour; thin flexible reflective membrane; Adaptive optics; Astrophysics; Biomembranes; Electromagnetic modeling; Magnetic materials; Magnetostriction; Mirrors; Optical films; Permanent magnets; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
