The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 1985
Filed:
Oct. 27, 1983
Carlo La Fiandra, New Canaan, CT (US);
Peter B Mumola, Huntington, CT (US);
The Perkin-Elmer Corporation, Norwalk, CT (US);
Abstract
This invention is directed to an actuator which is particularly adapted among many other possible uses, or use in adjusting the configuration of deformable mirrors. The actuator comprises a housing mounted for movement on a fixed base, the housing being fabricated from magnetic material and being configured to have two spaced pole faces of opposite polarity, a housing coil mounted on the housing to form an electro-magnet, apparatus for moving the housing having infinite reflected inertia, a force arm mounted for movement on a fixed base, one portion of the force arm having an output drive pick-off and another portion of the force arm being disposed between the poles faces of the housing, pole pieces mounted on the force arm adjacent the pole faces, respectively, a force arm coil mounted on the force arm to form an electro-magnet, a first permanent magnet mounted on the housing and a second permanent magnet mounted on the force arm which coact to form a magnet coupling between the force arm and the housing, a controller for controlling the apparatus for moving the housing to thereby control the course adjustment output from the force arm and provide low frequency integration of the force arm and for controlling the flow of current to the housing coil and the force arm coil to provide a net force greater than the net force of the two permanent magnets to thereby control the fine adjustment output from the force arm.