Deformable magnetic mirror for adaptive ...
Document type :
Compte-rendu et recension critique d'ouvrage
DOI :
Title :
Deformable magnetic mirror for adaptive optics: technological aspects
Author(s) :
Cugat, O. [Auteur]
Laboratoire d'électrotechnique de Grenoble [LEG]
Basrour, Skandar [Auteur]
Techniques de l'Informatique et de la Microélectronique pour l'Architecture des systèmes intégrés [TIMA]
Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) [FEMTO-ST]
Divoux, C. [Auteur]
Laboratoire d'électrotechnique de Grenoble [LEG]
Mounaix, P. [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Reyne, G. [Auteur]
Laboratoire d'électrotechnique de Grenoble [LEG]
Laboratoire d'électrotechnique de Grenoble [LEG]
Basrour, Skandar [Auteur]
Techniques de l'Informatique et de la Microélectronique pour l'Architecture des systèmes intégrés [TIMA]
Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) [FEMTO-ST]
Divoux, C. [Auteur]
Laboratoire d'électrotechnique de Grenoble [LEG]
Mounaix, P. [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Reyne, G. [Auteur]
Laboratoire d'électrotechnique de Grenoble [LEG]
Journal title :
Sensors and Actuators A: Physical
Pages :
1-9
Publisher :
Elsevier
Publication date :
2001
ISSN :
0924-4247
English keyword(s) :
Planar coils
Magnetic microactuator
Deformable mirror
Adaptive optics
Magnetic microactuator
Deformable mirror
Adaptive optics
HAL domain(s) :
Sciences de l'ingénieur [physics]/Micro et nanotechnologies/Microélectronique
English abstract : [en]
Ground-based telescopes suffer from atmospheric turbulences which perturb the quality of the light arriving from space. Astronomers use adaptive optics in order to correct the wavefront of oncoming light. In this context, ...
Show more >Ground-based telescopes suffer from atmospheric turbulences which perturb the quality of the light arriving from space. Astronomers use adaptive optics in order to correct the wavefront of oncoming light. In this context, a prototype of electromagnetic miniature (Ø 50 mm) deformable mirror is developed, using available microtechnologies. The mirror is composed of a thin polymer membrane (2–5 μm) covered with a matrix of permanent magnets, and of an array of planar microcoils on a Ø 50 mm substrate. The paper presents the various technologies used to build the actuator (membranes, coils, magnets). The mechanical behaviour of the mirror is tested. Deformations of up to 20 μm are achieved with currents in the range 1–3 A (6.6 μm/A). Resonance occurs at 485 Hz, with good linearity up to 200 Hz.Show less >
Show more >Ground-based telescopes suffer from atmospheric turbulences which perturb the quality of the light arriving from space. Astronomers use adaptive optics in order to correct the wavefront of oncoming light. In this context, a prototype of electromagnetic miniature (Ø 50 mm) deformable mirror is developed, using available microtechnologies. The mirror is composed of a thin polymer membrane (2–5 μm) covered with a matrix of permanent magnets, and of an array of planar microcoils on a Ø 50 mm substrate. The paper presents the various technologies used to build the actuator (membranes, coils, magnets). The mechanical behaviour of the mirror is tested. Deformations of up to 20 μm are achieved with currents in the range 1–3 A (6.6 μm/A). Resonance occurs at 485 Hz, with good linearity up to 200 Hz.Show less >
Language :
Anglais
Popular science :
Non
Source :