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

Volume

34

Issue

5

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

3564

Lastpage

3567

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.717841

Filename

717841