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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Sekine; Koujirou
Address:
Ibaraki, JP
No. of patents:
13
Patents:












Patent Number Title Of Patent Date Issued
8274866 Optical recording head and optical recording apparatus September 25, 2012
An optical recording head includes: a light source; a slider comprising a wave guide which irradiates light from the light source to a recording medium, wherein a grating coupler is formed on an end portion at an opposite side of the waveguide relative to the light source; and an opt
8134893 Optical recording head and optical recording apparatus March 13, 2012
Provided is an optical recording head in which a light beam from a light source is collected by an optical element and reflected on a reflecting surface to be formed into a spot light. Since a support portion for supporting the light source of the optical element at a predetermined p
8072847 Optical device, optically heat assisted magnetic recording head and optically heat assisted magn December 6, 2011
Provided are an optical device, optically assisted magnetic recording head and optically assisted magnetic recording apparatus that effectively emit the introduced light, from the apex portion of a waveguide. The optical device includes: an optical element having a substantially para
7944780 Magnetic recording device and magnetic recording head drive mechanism having a magnetic applying May 17, 2011
Provided is a magnetic recording device which can perform high density magnetic recording by simple constitution. The magnetic recording device is provided with a disk driving device for rotating a magnetic disk; a head having a heating section for heating a circular track of the mag
7755978 Recording head and recorder July 13, 2010
A recorder has a recording head which uses light for information recording to a recording medium. The recording head has a slider and an optical waveguide. The slider moves relative to the recording medium while floating thereon. The optical waveguide is provided in the slider and has
7385761 Diffraction grating device and optical apparatus June 10, 2008
A diffraction grating device for splitting or coupling light beams permits the divergence of the light beams to be minimized easily. A first light beam is incident on a diffraction grating from the side thereof facing the inside of the device, and a second light beam is incident on the
7199926 Diffraction grating device and optical apparatus April 3, 2007
A diffraction grating device for splitting or coupling light beams permits the divergence of the light beams to be minimized easily. A first light beam is incident on a diffraction grating from the side thereof facing the inside of the device, and a second light beam is incident on the
7056037 Optical bidirectional module June 6, 2006
An optical bidirectional module 10 having therein light emitting element 11 which transmits optical signal to the end facet of the optical fiber, light receiving element 12 which receives optical signal from the end facet of the optical fiber and stair-shaped multi-level grating 15,
7038852 Polarization conversion optical system and polarization conversion element May 2, 2006
A polarization conversion optical system converts light having a nonuniform plane of polarization into light having a uniform plane of polarization. The system includes a multilayer dielectric film at the side upon which the target light is incident. The film exhibits the property th
6853760 Optical functional device and optical integrated device February 8, 2005
On a waveguide 34 formed on a substrate 33, a plurality of comblike shaped electrodes 37, 38 that generate surface acoustic waves 37a, 38a from different directions are provided. And a periodic refractive indices portion 40 is formed, where the refractive indices are periodically dis
6822796 Diffractive optical element November 23, 2004
A diffractive optical element has a diffraction grating formed by periodic depressions and projections on the surface of a substrate and a dielectric multilayer film on the diffraction grating. The materials of the respective layers of the film are chosen such that the depth of the d
6807330 Optical switch using an optical waveguide October 19, 2004
Disclosed herein is an optical switch for changing over a running direction of a light passing through an optical waveguide between a first direction and a second direction by moving a switching member disposed on an optical path of an optical waveguide. The switching member has a plural
6466708 Optical module and manufacturing method thereof October 15, 2002
An optical module has a substrate, a waveguide, formed on the substrate, for guiding light, and a photonic crystal portion that has media having different refractive indices arranged in a periodic pattern and that is disposed in a channel of the waveguide on the substrate. Here, the










 
 
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