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:
Jan. 30, 2001
Filed:
Mar. 11, 1999
Michel Laberge, Bowen Island, CA;
Creo Srl, Burnaby, CA;
Abstract
A method and apparatus for a fault tolerant recording system using a laser diode array is disclosed. The laser diode array comprises individually addressable diodes which are used to record data on parallel tracks of a recording surface. Narrowing the separation between the parallel recording tracks without modifying the diode spacing within the array may be accomplished by precise movement of the diode array with respect to the recording surface, so as to generate an interleaved recording pattern. Fault tolerance is added by creating a redundancy (integrated into the interleaving mechanism) wherein each track on the recording surface is assigned a primary diode and a secondary diode, only one of which is active at a particular time. If a failure occurs in the primary diode assigned to a particular track, then the secondary diode is activated, and the recording of data on the particular track remains unaffected.