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. 08, 2013
Filed:
Sep. 25, 2008
Masakazu Hirata, Chiba, JP;
Manabu Oumi, Chiba, JP;
Majung Park, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A near field optical head includes a slider, a main magnetic poleand an auxiliary magnetic poleand is provided with a recording elementfixed on a top end surface of the slider. The near field optical head is provided with a light flux transmission element. The light flux transmission elementis fixed adjacently to the main magnetic pole and formed from a flat surfaceand a curved surfaceinto the shape of a half column. The light flux transmission elementincludes a corefor transmitting a light flux L introduced from one end to the other end and a claddingfor confining therein the core. The near field optical head includes a metal film, which is formed on a curved surface in the vicinity of the other end of the core for generating near filed light R from a light flux to localize the near field light on a field surface between the metal film and the curved surface, and a light flux introducing meansfor introducing the light flux having a polarization direction adjusted into a straight direction substantially perpendicular to the flat surface from one end into the core. A top end of the main magnetic poleis bent toward the core and embedded in the core while being exposed to the other end.