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. 16, 2002
Filed:
Sep. 28, 1999
Russell B. Rauch, Pasadena, CA (US);
Mark Shi Wang, Irvine, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
The multi-channel optical head for recording and reading optical storage data has a write laser array for generating a plurality of write beams and a read laser array for generating a plurality of read beams. The write beams and the read beams share a common optical path with a first broadband non-polarizing beam splitter which directs the beams towards the optical recording medium or to a power detector and with a second broadband non-polarizing beam splitter which directs the write beams and the read beams to the optical recording medium and which directs the read beams, after retroreflection and information modulation from the optical recording medium, to be split by a beam splitter and focused onto a detector to provide focusing information and another detector which detects its intensity to read data and provides tracking information.