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:
Apr. 14, 1998
Filed:
Aug. 09, 1996
Philip F Marino, Rochester, NY (US);
Charles J Simpson, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An optical actuator is disclosed which includes a base, a moveable lens holder including an objective lens and positioned relative to the base, and at least six planar magnetic coils and a plurality of magnetic assemblies arranged to be associated with the coils, each of the assemblies including magnets having two or more poles fixed to the actuator base, the coils and the magnets being mounted relative to each other on the lens holder and the base. The actuator includes circuitry for applying signals to the coils to induce magnetic fields in the coils for positioning the lens holder and detectors for providing signals representing the four degrees of freedom of positions of the lens holder with respect to the base. A computational circuitry responsive to the detectors determines the coil signals for positioning the moveable lens holder in six degrees of freedom of motion relative to the base.