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. 04, 2001
Filed:
Apr. 29, 1998
Glenn J. Maenza, Glen Mills, PA (US);
Edward W. Morton, Turnersville, NJ (US);
Other;
Abstract
A system for the on-the-fly control of jitter during optical disc mastering/recording includes a record disc (,) having a recording surface (,) thereon of the type in which a pit can be read directly after it is written. A write-laser (,) directs its write-beam (,) though an acousto-optic modulator (,) onto the recording surface (,) of the rotating record disc (,). A digital processor (,) accepts digital input values and outputs a signal to the acousto-optic modulator (,) that effectively gates the write-beam (,) on and off. A read-laser (,) is positioned downtrack from the write-laser (,) and reads the pits (,) immediately or shortly after being written by the write-laser (,). The output of the read-laser (,) is fed into a jitter detector (,) that senses the start and stop positions of a sequence of pits (,) and effects an analysis to arrive at a jitter value. A jitter compensator (,) provides a processed correction value to the digital processor (,) which then controls the write-laser (,) to reduce the measured jitter value.