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. 04, 2006
Filed:
Nov. 22, 2002
Coen Theodorus Hubertus Fransiscus Liedenbaum, Eindhoven, NL;
Hendrik Van Houten, Eindhoven, NL;
Coen Theodorus Hubertus Fransiscus Liedenbaum, Eindhoven, NL;
Hendrik Van Houten, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An optical scanning device () is for scanning with a radiation beam a substantially circular track of an information layer (). The device includes: (i) a radiation source () for providing the radiation beam (), (ii) a lens system () for transforming the radiation beam to a scanning spot () in the information layer, the lens system including a first objective lens assembly () having an optical axis (CC'), (iii) a head rotation unit () for the first objective lens assembly which is rotatable about an axis of rotation (BB′), and (iv) first driving means () for rotating the head rotation unit about the axis of rotation. The center of curvature of the track substantially coincides with the axis of rotation. According to the invention, the objective lens assembly is movable substantially in a radial direction with respect to and perpendicular to the axis of rotation.