Patents by Inventor Eishin Mori
Eishin Mori has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8467282Abstract: An object of the invention is to provide an optical disc device, an optical head, and an information processing device that enable to advantageously record or reproduce information with respect to an information recording medium having three or more information recording surfaces with light transmissive layers of different thicknesses from each other.Type: GrantFiled: August 3, 2009Date of Patent: June 18, 2013Assignee: Panasonic CorporationInventors: Fumitomo Yamasaki, Eishin Mori
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Patent number: 8208359Abstract: An object of the invention is to provide an optical element for use in an optical information recording and reproducing device or a like device for recording or reproducing information with respect to an information recording medium using laser light, wherein the optical element is a resin optical element capable of suppressing lowering in transmittance due to deterioration by irradiation of light having a high energy density, and maintaining a high transmittance for a long time. To realize the above object, used is an optical element made of a silicon resin cured material obtained by subjecting a silicon resin composition containing a silsesquioxane compound to a curing treatment.Type: GrantFiled: December 4, 2007Date of Patent: June 26, 2012Assignee: Panasonic CorporationInventors: Hideki Aikoh, Makoto Takashima, Eishin Mori, Kousei Sano, Joji Anzai, Kenichi Shinotani
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Patent number: 8068403Abstract: To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc. The head includes: a first optical system for converging light from a light source on a first or second storage layer; a second optical system for receiving and transmitting light reflected from the first layer and stray light reflected from the second layer when the light is converged on the first layer; a photodetector; and a calculator. The photosensitive areas of the photodetector output signals representing intensities of the light incident there through the second system. The reflected and stray light incident on the second system interfere with each other, and the first and second groups of areas are arranged so as to be equally affected by a variation in intensity caused by the interference.Type: GrantFiled: October 13, 2006Date of Patent: November 29, 2011Assignee: Panasonic CorporationInventors: Takayuki Nagata, Joji Anzai, Hideki Aikoh, Eishin Mori, Kousei Sano, Yoshiaki Komma, Akihiro Arai
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Patent number: 8045426Abstract: An object of the invention is to suppress an influence of a wavefront aberration which is generated at the time of correcting a third-order spherical aberration, and realize satisfactory information recording and/or reproducing. A collimator lens 4 corrects a third-order spherical aberration which is generated depending on the thickness of a light transmissive layer from a surface of a first optical information recording medium 30, corresponding to an optimal substrate thickness of a first objective lens 6, to an intended information recording surface, assuming that the light transmissive layer thickness of the first optical information recording medium 30 which minimizes a residual third-order spherical aberration at the time of incidence of parallel light into the first objective lens 6 is defined as the optimal substrate thickness of the first objective lens 6.Type: GrantFiled: May 29, 2008Date of Patent: October 25, 2011Assignee: Panasonic CorporationInventors: Eishin Mori, Kousei Sano, Joji Anzai, Hideki Aikoh
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Patent number: 8036093Abstract: An optical head device includes a first light source and a second light source respectively emitting a first light beam and a second light beam, a luminous flux separating section selectively separating the first and second light beams for which the same optical path is used, to first and second optical paths, respectively, and a first objective lens converging the first light beam that has been separated to the first optical path on the first optical information recording medium. Further, the optical head device includes a second objective lens made of resin and converging the second light beam separated to the second optical path on the second optical information recording medium, and a first filtering section formed on a beam exit face of the second objective lens and reducing the transmittance of the first light beam to be lower than transmittance of the second light beam.Type: GrantFiled: August 6, 2009Date of Patent: October 11, 2011Assignee: Panasonic CorporationInventors: Eishin Mori, Fumitomo Yamasaki, Yoshiaki Komma
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Patent number: 7965612Abstract: An optical head that is restrained from becoming larger, even if it is used for an optical-information recording medium that includes a plurality of information recording layers. In this optical head, a collimating lens is formed by a concave lens disposed on the side of a light source and a convex lens disposed on the side of an objective lens. A collimating-lens actuator moves the convex lens in a direction where a spherical aberration is cancelled which is generated according to the thickness of a light transmission layer up to an information recording layer of the optical-information recording medium. An aperture stop is provided on the side of the collimating lens with respect to the objective lens, and the aperture stop is located near the focal position of the convex lens on the side of the objective lens.Type: GrantFiled: December 18, 2009Date of Patent: June 21, 2011Assignee: Panasonic CorporationInventors: Eishin Mori, Akihiro Arai, Fumitomo Yamasaki, Joji Anzai
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Patent number: 7952978Abstract: An optical controller includes a light source for emitting light, an object lens for condensing light emitted from the light source, a light detection unit for receiving light reflected on an optical information recording medium and outputting a signal corresponding to the amount of the light, and a laser control unit for controlling the amount of the light emitted from the light source to the information recording surface on which information is to be recorded or reproduced, based on the recording state of an information recording surface disposed closer to the object lens than an information recording surface on which the information is to be recorded or reproduced.Type: GrantFiled: October 19, 2006Date of Patent: May 31, 2011Assignee: Panasonic CorporationInventors: Joji Anzai, Hideki Aikoh, Eishin Mori, Takayuki Nagata
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Patent number: 7869331Abstract: An optical head includes a hologram which extracts, from a luminous flux of reflected light from an optical disk, at least a first luminous flux branch which does not include the optical axis of the luminous flux; and a photodetector which receives the reflected light from the optical disk and produces signal output, wherein the photodetector has light-receiving areas which receive the first luminous flux branch of reflected light from an optical information recording medium layer targeted for recording or playback out of the plurality of optical information recording medium layers of the optical disk, the light-receiving areas are placed in such a way that the signal output resulting from a light spot formed by the first luminous flux branch of the reflected light from the optical information recording medium layer targeted for recording or playback is practically the same between the first and second photodetection areas, and a boundary line of the light-receiving areas is located in such a position as notType: GrantFiled: February 13, 2007Date of Patent: January 11, 2011Assignee: Panasonic CorporationInventors: Eishin Mori, Akihiro Arai, Joji Anzai, Hideki Aikoh
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Patent number: 7848208Abstract: An optical head device is provided with a semiconductor laser, an aberration correcting element for transmitting a beam from the semiconductor laser, a light guiding portion for introducing the beam from the semiconductor laser to the aberration correcting element, and an objective lens for focusing the beam having passed through the aberration correcting element on an optical disc. The aberration correcting element corrects a longitudinal chromatic aberration occurring in the objective lens and a longitudinal chromatic aberration occurring in the light guiding portion excluding the objective lens and the aberration correcting element based on a longitudinal chromatic aberration occurring in the aberration correcting element when the semiconductor laser emits a beam having a wavelength different by a specified wavelength difference.Type: GrantFiled: October 5, 2007Date of Patent: December 7, 2010Assignee: Panasonic CorporationInventors: Eishin Mori, Hideki Aikoh, Joji Anzai, Kousei Sano
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Publication number: 20100254236Abstract: An object of the invention is to suppress an influence of a wavefront aberration which is generated at the time of correcting a third-order spherical aberration, and realize satisfactory information recording and/or reproducing. A collimator lens 4 corrects a third-order spherical aberration which is generated depending on the thickness of a light transmissive layer from a surface of a first optical information recording medium 30, corresponding to an optimal substrate thickness of a first objective lens 6, to an intended information recording surface, assuming that the light transmissive layer thickness of the first optical information recording medium 30 which minimizes a residual third-order spherical aberration at the time of incidence of parallel light into the first objective lens 6 is defined as the optimal substrate thickness of the first objective lens 6.Type: ApplicationFiled: May 29, 2008Publication date: October 7, 2010Inventors: Eishin Mori, Kousei Sano, Joji Anzai, Hideki Aikoh
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Publication number: 20100246343Abstract: An object of the invention is to provide an optical disc device, an optical head, and an information processing device that enable to advantageously record or reproduce information with respect to an information recording medium having three or more information recording surfaces with light transmissive layers of different thicknesses from each other.Type: ApplicationFiled: August 3, 2009Publication date: September 30, 2010Inventors: Fumitomo Yamasaki, Eishin Mori
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OPTICAL PICKUP DEVICE, OPTICAL DISC DEVICE, COMPUTER, OPTICAL DISC PLAYER, AND OPTICAL DISC RECORDER
Publication number: 20100214891Abstract: A first light source 1a emits a first light flux with a first wavelength. A second light source 1b emits a second light flux with a second wavelength that is different from the first wavelength and a third light flux with a third wavelength that is different from the first wavelength and the second wavelength. A collimator lens 6, a first objective lens 9, and a second objective lens 10 collect the first to third light fluxes as converged light on an optical disc. A first composite photodetector 13 detects the reflected light fluxes from the optical disc. The first composite photodetector 13 includes a first quartered light-receiving unit 13a that receives a light flux obtained by reflection of at least one light flux from among the first to third light fluxes from the optical disc and a second quartered light-receiving unit 13b that receives a light flux obtained by reflection of the remaining light fluxes from the optical disc.Type: ApplicationFiled: October 2, 2008Publication date: August 26, 2010Inventors: Joji Anzai, Kousei Sano, Eishin Mori, Hideki Aikoh, Hirotaka Ueno -
Patent number: 7773468Abstract: Fifth order spherical aberration in addition to third order spherical aberration for an optical information recording medium of which thickness of a light transmission layer changes greatly is corrected. An objective lens collects a laser beam emitted from a semiconductor laser on an optical information recording medium. A spherical aberration correcting portion corrects spherical aberration generated according to a thickness of the light transmission layer of the optical information recording medium, in which the spherical aberration correcting portion includes a collimator lens, a lens holder and a stepping motor for correcting the third order spherical aberration and a liquid crystal element and an applied voltage control portion for correcting the fifth order spherical aberration.Type: GrantFiled: April 11, 2006Date of Patent: August 10, 2010Assignee: Panasonic CorporationInventors: Fumitomo Yamasaki, Eishin Mori, Hideki Aikoh, Akihiro Arai, Joji Anzai
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Publication number: 20100091636Abstract: An optical head that is restrained from becoming larger, even if it is used for an optical-information recording medium that includes a plurality of information recording layers. In this optical head, a collimating lens is formed by a concave lens disposed on the side of a light source and a convex lens disposed on the side of an objective lens. A collimating-lens actuator moves the convex lens in a direction where a spherical aberration is cancelled which is generated according to the thickness of a light transmission layer up to an information recording layer of the optical-information recording medium. An aperture stop is provided on the side of the collimating lens with respect to the objective lens, and the aperture stop is located near the focal position of the convex lens on the side of the objective lens.Type: ApplicationFiled: December 18, 2009Publication date: April 15, 2010Inventors: Eishin Mori, Akihiro Arai, Fumitomo Yamasaki, Joji Anzai
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Patent number: 7665624Abstract: The gasket is interposed between the seal face and the seal retaining portion of the fuel cap. The gasket has a first lip for pressing against the seal face, a second lip for pressing against the seal retaining portion, and a connecting portion connecting the first lip with the second lip; and is formed with a C-shaped cross section. An assist rib projects from the inside face of the second lip. The assist rib is formed so as to press the distal edge of the first lip towards the seal face.Type: GrantFiled: December 21, 2006Date of Patent: February 23, 2010Assignee: Toyoda Gosei Co., Ltd.Inventors: Kentaro Enomoto, Hiroyuki Hagano, Masayuki Nakagawa, Eishin Mori
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Publication number: 20100034073Abstract: An optical head device includes a first light source and a second light source which respectively emits a first light beam and a second light beam, a luminous flux separating section which selectively separates the first and second light beams for which the same optical path is used, to first and second optical paths, respectively, a first objective lens for converging the first light beam that has been separated to the first optical path on the first optical information recording medium, a second objective lens made of resin for converging the second light beam separated to the second optical path on the second optical information recording medium, and a first filtering section formed on a beam exit face of the second objective lens, for reducing the transmittance of the first light beam to be lower than transmittance of the second light beam.Type: ApplicationFiled: August 6, 2009Publication date: February 11, 2010Inventors: Eishin MORI, Fumitomo YAMASAKI, Yoshiaki KOMMA
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Patent number: 7656775Abstract: An optical head that is restrained from becoming larger, even if it is used for an optical-information recording medium that includes a plurality of information recording layers. In this optical head, a collimating lens is formed by a concave lens disposed on the side of a light source and a convex lens disposed on the side of an objective lens. A collimating-lens actuator moves the convex lens in a direction where a spherical aberration is cancelled which is generated according to the thickness of a light transmission layer up to an information recording layer of the optical-information recording medium. An aperture stop is provided on the side of the collimating lens with respect to the objective lens, and the aperture stop is located near the focal position of the convex lens on the side of the objective lens.Type: GrantFiled: November 15, 2005Date of Patent: February 2, 2010Assignee: Panasonic CorporationInventors: Eishin Mori, Akihiro Arai, Fumitomo Yamasaki, Joji Anzai
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Publication number: 20090268588Abstract: An object of the invention is to provide an optical element for use in an optical information recording and reproducing device or a like device for recording or reproducing information with respect to an information recording medium using laser light, wherein the optical element is a resin optical element capable of suppressing lowering in transmittance due to deterioration by irradiation of light having a high energy density, and maintaining a high transmittance for a long time. To realize the above object, used is an optical element made of a silicon resin cured material obtained by subjecting a silicon resin composition containing a silsesquioxane compound to a curing treatment.Type: ApplicationFiled: December 4, 2007Publication date: October 29, 2009Inventors: Hideki Aikoh, Makoto Takashima, Eishin Mori, Kousei Sano, Joji Anzai, Kenichi Shinotani
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Publication number: 20090262630Abstract: An optical controller includes a light source for emitting light, an object lens for condensing light emitted from the light source, a light detection unit for receiving light reflected on an optical information recording medium and outputting a signal corresponding to the amount of the light, and a laser control unit for controlling the amount of the light emitted from the light source to the information recording surface on which information is to be recorded or reproduced, based on the recording state of an information recording surface disposed closer to the object lens than an information recording surface on which the information is to be recorded or reproduced.Type: ApplicationFiled: October 19, 2006Publication date: October 22, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Joji Anzai, Hideki Aikoh, Eishin Mori, Takayuki Nagata
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Publication number: 20090257340Abstract: To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc. The head includes: a first optical system for converging light from a light source on a first or second storage layer; a second optical system for receiving and transmitting light reflected from the first layer and stray light reflected from the second layer when the light is converged on the first layer; a photodetector; and a calculator. The photosensitive areas of the photodetector output signals representing intensities of the light incident there through the second system. The reflected and stray light incident on the second system interfere with each other, and the first and second groups of areas are arranged so as to be equally affected by a variation in intensity caused by the interference.Type: ApplicationFiled: October 13, 2006Publication date: October 15, 2009Inventors: Takayuki Nagata, Joji Anzai, Hideki Aikoh, Eishin Mori, Kousei Sano, Yoshiaki Komma, Akihiro Arai