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:
Jul. 22, 2014
Filed:
Oct. 23, 2012
Kazuko Ichihara, Chiba, JP;
Kenji Kato, Chiba, JP;
Takashi Niwa, Chiba, JP;
Susumu Ichihara, Chiba, JP;
Norio Chiba, Chiba, JP;
Manabu Oumi, Chiba, JP;
Nobuyuki Kasama, Chiba, JP;
Yasuyuki Mitsuoka, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A near-field optical head for recording and reading-out information on and from a recording medium by utilizing near-field light produced from a very small aperture. The very small aperture is formed at an apex of a taper formed by an optical propagation member having a tip pointed toward a recording medium. A light introducing part is connected directly to the optical propagation member for propagating light along an optical path extending in a direction generally parallel to the recording medium. The optical propagation member is formed of a uniform dielectric layer in the light introducing part and inside of the taper. A light reflection layer reflects light propagated through the light introducing part toward the very small aperture.