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:
Sep. 10, 1996
Filed:
Sep. 06, 1994
John R Leonard, Glendale, AZ (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
An optical element driving mechanism is disclosed wherein an electromagnetic motor positions an optical element such that a laser beam passing through the optical element is focused onto an optical disk media. The optical element can be translated in two axes by energizing coils suspended within stationary magnetic fields produced by permanent magnets. The magnitude and direction of displacement is controlled by the current passing through the coils. A two axis electro-optical position sensing apparatus for determining the position of the optical element is embedded within the driving mechanism. The position sensing apparatus detects the relative position of the optical element in two axes by imaging a light emitting diode onto a four element photodetector.