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. 17, 2013
Filed:
May. 09, 2011
Gael Pilard, Wankheim, DE;
Larisa Von Riewel, Mainaschaff, DE;
Gael Pilard, Wankheim, DE;
Larisa Von Riewel, Mainaschaff, DE;
Thomson Licensing, Issy les Moulineaux, FR;
Abstract
Method for reading data from an optical disc comprising a substrate layer, a read-only data layer, and a nonlinear layer with a super-resolution structure disposed on the data layer, the read-only data layer including diffractive pits and lands having a length larger than the diffraction limit of the pickup and super-resolution pits and lands having a length smaller than the diffraction limit of the pickup, the method comprising the steps of using a pickup including a laser for providing a HF signal for retrieving of the data of the data layer, providing a constant laser power for retrieving of the data, and pulsing the laser at the end of a diffractive pit or land. The Apparatus comprises a pickup with a laser and a comparator responsive to a threshold level and to the HF signal, for providing a trigger signal for pulsing of the laser.