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. 25, 2012
Filed:
Apr. 13, 2005
Tim Rausch, Gibsonia, PA (US);
William Albert Challener, Sewickley, PA (US);
Edward Charles Gage, Mars, PA (US);
Christophe Daniel Mihalcea, Pittsburgh, PA (US);
Chubing Peng, Pittsburgh, PA (US);
Patrick Breckow Chu, Wexford, PA (US);
Kevin Arthur Gomez, Wexford, PA (US);
Tim Rausch, Gibsonia, PA (US);
William Albert Challener, Sewickley, PA (US);
Edward Charles Gage, Mars, PA (US);
Christophe Daniel Mihalcea, Pittsburgh, PA (US);
Chubing Peng, Pittsburgh, PA (US);
Patrick Breckow Chu, Wexford, PA (US);
Kevin Arthur Gomez, Wexford, PA (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
An apparatus comprises an optical transducer positioned adjacent to a storage medium and including a waveguide and a grating for coupling light into the waveguide, a light source transmitting light to the grating, and a detector for detecting a portion of the light, wherein the detected portion of the light has a magnitude that varies in response to the amount of light coupled into the waveguide.