Magnetodistortive actuator arrangement
US4861149A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Jan 7, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/0825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnetodistortive acutator arrangement for a flexible mirror that is mounted on a support includes an array of magnetodistortive actuators. Each of these actuators includes an elongated core of a highly magnetically permeable material stationarily mounted on the support, centered on a longitudinal axis and having two axially spaced end portions, a solenoid coil surrounding one of the end portions of the core and operative when energized for generating an electromagnetic field which permeates the core and has a high intensity region extending beyond the other of the end portions of the core, an active member of a magnetodistortive material connected to the core and extending axially beyond the other end portion thereof at least partially through the high-intensity region of the electromagnetic field for the latter to cause a change at least the axial dimension of the active member, and a transmitting member which applies this change to the flexible mirror. The coils of adjacent actuators are axially staggered relative to one another so as not to overlap each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.