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:
Jan. 04, 2005
Filed:
Feb. 21, 2003
John G. Hughes, Casselberry, FL (US);
John G. Hughes, Casselberry, FL (US);
Lockheed Martin Corporation, Bethesda, MD (US);
Abstract
A fast steering mirror method and apparatus comprising employing a plurality of linear actuators and a plurality of springs. Four actuators and four springs may be employed, with one at each corner of the mirror. If only two amplifiers are employed, the linear actuators are then cross coupled. Control means supplies current to the plurality of linear actuators, preferably with each actuator providing force proportional to current supplied, each comprising a motor and one or more current loops around the motor, with the control means causing displacement of the spring paired with a corresponding linear actuator by a distance approximately proportional to current supplied to the corresponding linear actuator and with the control means causing rotation of the mirror by an angle approximately equal to the displacement of the spring divided by the moment arm from the center line of the mirror to the center of the corresponding linear actuator.