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:
Nov. 27, 2012
Filed:
Aug. 28, 2009
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;
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 has a planar substrate having a first surface, a second surface disposed opposite to the first surface, and an inverted pyramidal hole extending through the first and second surfaces. The inverted pyramidal hole has at least one fine aperture formed at an apex thereof and disposed in the first surface and having at least one curved slant surface. An optical waveguide extends into the inverted pyramidal hole of the planar substrate for propagating light along an optical path. A mirror is disposed in the optical waveguide for bending in the direction of the fine aperture the optical path of the light propagated through the optical waveguide.