Hajime Ishihara
Hajime Ishihara, Minoh-Shi JP
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20090255807 | Quantum dot manipulating method and quantum dot production/manipulation apparatus - A quantum dot manipulating method and a generation/manipulation apparatus are provided which can control the size of a large number of generated quantum dots on or below the order of percent which is required for optical applications of the dots. | 10-15-2009 |
Hajime Ishihara, Chigasaki JP
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20110211431 | SEMICONDUCTOR INTEGRATED CIRCUIT AND DISK RECORDING AND REPRODUCING DRIVE USING THE SAME - The present invention enables a comprehensive evaluation from both of data read from a disk and a servo signal of a servo controller. The present invention provides a semiconductor integrated circuit mountable to a disk recording and reproducing drive, which comprises a signal processor of an RF signal read from a pickup, a servo controller responsive to a servo error signal read from the pickup, a memory controller, and an external interface. The memory controller is supplied with read data and a servo signal and stores the read data and the servo signal in a buffer memory according to a time division process. The read data and the servo signal stored in the buffer memory can be transferred to an external device via the external interface by the memory controller. | 09-01-2011 |
Hajime Ishihara, Sakai-Shi JP
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20110235163 | COMPOSITE PHOTONIC STRUCTURE ELEMENT, SURFACE EMITTING LASER USING THE COMPOSITE PHOTONIC STRUCTURE ELEMENT, WAVELENGTH CONVERSION ELEMENT, AND LASER PROCESSING DEVICE USING THE WAVELENGTH CONVERSION ELEMENT - A composite photonic structure element comprises a photonic crystal and multilayer films. The photonic crystal is formed by alternately laminating a plurality of sets of an active layer having a nonlinear effect for converting a fundamental wave into a second harmonic and an inactive layer having no nonlinear effect, and is constructed such that the energy of the fundamental wave coincides with a photonic bandgap end. Each of the multilayer films is formed by laminating a plurality of sets of two kinds of thin films having different refractive indexes and reflects the fundamental wave. The multilayer films are connected to both ends of the photonic crystal. The fundamental wave enters one of end faces and is reciprocally reflected between resonators having the multilayer films, so that the intensity of the fundamental wave is enhanced within the photonic crystal. The fundamental wave is converted into a second harmonic in the active layer, and the second harmonic is taken out from the other end face. | 09-29-2011 |
20130293945 | LIGHT GENERATION DEVICE AND LIGHT GENERATION METHOD - A terahertz light generation device | 11-07-2013 |
Hajime Ishihara, Ibazaki JP
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20120087073 | PORTABLE ELECTRONIC DEVICE - A portable electronic device | 04-12-2012 |
20140139988 | PORTABLE ELECTRONIC DEVICE - A portable electronic device | 05-22-2014 |
Hajime Ishihara, Takaoka JP
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20130083873 | INFORMATION REPRODUCTION APPARATUS AND INFORMATION REPRODUCTION METHOD - An information reproduction apparatus includes a generator of a channel clock synchronized to input data, an analog/digital converter for converting the input data with an 1/N clock which is in frequency one Nth (N: a positive real number) of the channel clock, and a Viterbi decoder including a unit for calculating a branch metric based on a difference between an output of the converter and a reference value, an ACS unit responsive to input of data corresponding to one time point of the 1/N clock, for adding the branch metric for one time point to an old path metric, comparing addition results, selecting a smaller result, and outputting a new path metric and a path selection signal, according to state transitions with N bits as a unit, a unit for determining a maximum likelihood path based on the selection signal, and a decoder for outputting a decoding result. | 04-04-2013 |
Hajime Ishihara, Tokyo JP
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20140185421 | OPTICAL INFORMATION REPRODUCING APPARATUS AND OPTICAL INFORMATION REPRODUCING METHOD - A method of calculating a reliability effective in a decoding process of hologram. An optical information reproducing apparatus that reproduces information with the use of the holography includes an image acquisition unit that reproduces two-dimensional data from a hologram disc, an image equalization unit that makes the two-dimensional data equal to target data having a target PR characteristic, a soft output decoding unit that decodes output data of the image equalization unit on the basis of the PR characteristic, and outputs a decoded result having a reliability, and an error correction unit that conducts an error correction of the data on the basis of the decoded result. | 07-03-2014 |