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:
Dec. 27, 1988
Filed:
Jun. 25, 1987
Rolf Andresen, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A focus and tracking support includes a pair of bender beams extending parallel to a track to be scanned. The bender beams are cantilevered from a mounting block carried by a head carriage. Disposed intermediate and pivotally secured to the distal ends of the bender beams is a lens holder having two pairs of oppositely-extending, pivotally-secured support arms connected to the distal ends. The arrangement is such that when the bender beams are moved in the same direction tracking functions are performed while when the bender beams are moved in opposing directions, focussing functions are performed. The arms and lens holder are formed from a plastic unitary member. When the bender beams are piezo-electric beams, electrical signals for focus and tracking controls are superposed for effecting simultaneous focus and tracking functions.