Patents by Inventor Takanobu Osaka
Takanobu Osaka 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: 9348121Abstract: A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.Type: GrantFiled: May 4, 2015Date of Patent: May 24, 2016Assignee: RICOH COMPANY, LTD.Inventors: Hibiki Tatsuno, Kiichiro Nishina, Yasuyuki Shibayama, Takanobu Osaka, Makoto Hirakawa
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Patent number: 9158119Abstract: Disclosed is an enlargement optical system configured to form an image of an object at an enlargement side, including a lens system and a mirror system in order from a side of the object, the lens system including at least one lens, the mirror system including a first mirror and a second mirror in order from a side of the object, and the second mirror being an concave mirror, wherein an intermediate image conjugate to the object is formed at a side of the object with respect to the second mirror and the first mirror is held to be capable of adjusting a position thereof.Type: GrantFiled: October 31, 2012Date of Patent: October 13, 2015Assignee: Ricoh Company, Ltd.Inventors: Kiichiro Nishina, Makoto Hirakawa, Hibiki Tatsuno, Yasuyuki Shibayama, Takanobu Osaka
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Publication number: 20150234158Abstract: A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.Type: ApplicationFiled: May 4, 2015Publication date: August 20, 2015Inventors: Hibiki TATSUNO, Kiichiro Nishina, Yasuyuki Shibayama, Takanobu Osaka, Makoto Hirakawa
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Patent number: 9069238Abstract: Disclosed is an image displaying apparatus including an image displaying element configured to form an image to be projected and a projection optical system having a positive refractive power and configured to project the image to be projected onto a screen, wherein the projection optical system includes a lens optical system and a mirror optical system, the lens optical system including plural lens groups, the mirror optical system including a first mirror and a second mirror, the second mirror being a concave mirror, wherein an intermediate image of a pixel of the image displaying element is formed between the image displaying element and the second mirror, and wherein the first mirror is held to be capable of adjusting a position thereof.Type: GrantFiled: October 31, 2012Date of Patent: June 30, 2015Assignee: Ricoh Company, Ltd.Inventors: Kiichiro Nishina, Makoto Hirakawa, Hibiki Tatsuno, Yasuyuki Shibayama, Takanobu Osaka
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Patent number: 9046674Abstract: A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.Type: GrantFiled: November 6, 2014Date of Patent: June 2, 2015Assignee: RICOH COMPANY, LTD.Inventors: Hibiki Tatsuno, Kiichiro Nishina, Yasuyuki Shibayama, Takanobu Osaka, Makoto Hirakawa
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Patent number: 9039196Abstract: An image displaying apparatus including a light source, an image displaying element configured to control exiting of incident light to display an image, an illumination optical system configured to illuminate the image displaying element with light exiting from the light source, and a projection optical system configured to project an image displayed on a display surface of the image displaying element, to provide an enlarged display. The projection optical system includes a lens optical system, a first mirror configured to reflect light transmitted through the lens optical system, and a second mirror configured to reflect light reflected from the first mirror toward the surface to be projected onto, and one of the mirrors is arranged at a position conjugate to the image displaying element, and wherein an optical surface of the one mirror is arranged to face vertically downward.Type: GrantFiled: October 31, 2012Date of Patent: May 26, 2015Assignee: RICOH COMPANY, LTD.Inventors: Makoto Hirakawa, Hibiki Tatsuno, Takanobu Osaka, Yasuyuki Shibayama, Kiichiro Nishina
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Publication number: 20150062696Abstract: A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.Type: ApplicationFiled: November 6, 2014Publication date: March 5, 2015Inventors: Hibiki TATSUNO, Kiichiro NISHINA, Yasuyuki SHIBAYAMA, Takanobu OSAKA, Makoto HIRAKAWA
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Patent number: 8922883Abstract: A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.Type: GrantFiled: November 5, 2012Date of Patent: December 30, 2014Assignee: Ricoh Company, Ltd.Inventors: Hibiki Tatsuno, Kiichiro Nishina, Yasuyuki Shibayama, Takanobu Osaka, Makoto Hirakawa
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Patent number: 8901472Abstract: An image displaying apparatus including a light source, a light condenser for condensing light to form a condensed light image, a light mixing element, a reflective image displaying element having plural micro-mirrors for changing an inclination angle of an individual micro-mirror between an on-state and an off-state, an illumination optical system including a condenser lens and a mirror for illumination, and a projection optical system for projecting reflected light from a micro-mirror being at an on-state among plural micro-mirrors constituting the reflective image displaying element, wherein the mirror for illumination is at a position nearest the reflective image displaying element on an optical path from the light mixing element to the reflective image displaying element and a reflection surface of this mirror for illumination is positioned at a side of the reflective image displaying element with respect to a projection lens system constituting a part of the projection optical system.Type: GrantFiled: August 13, 2012Date of Patent: December 2, 2014Assignee: Ricoh Company, Ltd.Inventors: Yasuyuki Shibayama, Takanobu Osaka, Yoshio Kubo, Tetsuya Fujioka
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Publication number: 20140268068Abstract: A light source unit includes a first reflector having a reflection face; a second reflector having a reflection face; a plurality of light sources; and a light condensing optical system to condense light emitted from the plurality of light sources. Light beams emitted from the plurality of light sources are reflected at a first reflection position on the reflection face of the first reflector, and then reflected at a second reflection position on the reflection face of the second reflector. The second reflection position is close to an optical axis of the light condensing optical system compared to the first reflection position.Type: ApplicationFiled: March 10, 2014Publication date: September 18, 2014Applicant: RICOH COMPANY, LTD.Inventors: Tatsuya TAKAHASHI, Takanobu OSAKA, Naoki NAKAMURA, Kazuhiro FUJITA, Takehiro NISHIMORI
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Publication number: 20140268072Abstract: A light source unit includes a first reflector having a reflection face; a second reflector having a reflection face; a plurality of light sources; and a light condensing optical system disposed between the first reflector and the second reflector. Light beams emitted from the plurality of light sources are reflected at a first reflection position on the reflection face of the first reflector, and then reflected at a second reflection position on the reflection face of the second reflector. The second reflection position is close to an optical axis of the light condensing optical system compared to the first reflection position. The light condensing optical system is configured such that the light beam passes through the light condensing optical system at least two times when the light beams reflect between the first reflector and the second reflector.Type: ApplicationFiled: February 25, 2014Publication date: September 18, 2014Applicant: Ricoh Company, Ltd.Inventors: Tatsuya TAKAHASHI, Takanobu OSAKA, Naoki NAKAMURA, Kazuhiro FUJITA, Takehiro NISHIMORI
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Publication number: 20140126045Abstract: A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.Type: ApplicationFiled: November 5, 2012Publication date: May 8, 2014Inventors: Hibiki TATSUNO, Kiichiro Nishina, Yasuyuki Shibayama, Takanobu Osaka, Makoto Hirakawa
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Publication number: 20140118818Abstract: Disclosed is an enlargement optical system configured to form an image of an object at an enlargement side, including a lens system and a mirror system in order from a side of the object, the lens system including at least one lens, the mirror system including a first mirror and a second mirror in order from a side of the object, and the second mirror being an concave mirror, wherein an intermediate image conjugate to the object is formed at a side of the object with respect to the second mirror and the first mirror is held to be capable of adjusting a position thereof.Type: ApplicationFiled: October 31, 2012Publication date: May 1, 2014Inventors: Kiichiro Nishina, Makoto Hirakawa, Hibiki Tatsuno, Yasuyuki Shibayama, Takanobu Osaka
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Publication number: 20130114053Abstract: An image display device includes an image display element, a light source, an illumination system, a projector system comprising a refractive optical system including a plurality of lens groups, and a mirror train including a curved mirror, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of the image display element, and a second focus structure configured to move the respective lens groups along the normal line of the image display element by different amounts from those of the first focus structure.Type: ApplicationFiled: November 5, 2012Publication date: May 9, 2013Inventors: Hibiki TATSUNO, Kiichiro Nishina, Yasuyuki Shibayama, Takanobu Osaka, Makoto Hirakawa
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Publication number: 20130107234Abstract: Disclosed is an image displaying apparatus including an image displaying element configured to form an image to be projected and a projection optical system having a positive refractive power and configured to project the image to be projected onto a screen, wherein the projection optical system includes a lens optical system and a mirror optical system, the lens optical system including plural lens groups, the mirror optical system including a first mirror and a second mirror, the second mirror being a concave mirror, wherein an intermediate image of a pixel of the image displaying element is formed between the image displaying element and the second mirror, and wherein the first mirror is held to be capable of adjusting a position thereof.Type: ApplicationFiled: October 31, 2012Publication date: May 2, 2013Inventors: Kiichiro NISHINA, Makoto Hirakawa, Hibiki Tatsuno, Yasuyuki Shibayama, Takanobu Osaka
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Publication number: 20130107166Abstract: Disclosed is an image displaying apparatus comprising an illumination optical system, an image displaying element configured to be illuminated by the illumination optical system, a projection optical system configured to project light from the image displaying element onto a screen, and a dust-proof member provided between the screen and the projection optical system, wherein the projection optical system includes a projection lens composed of plural lenses and a mirror configured to reflect reflection light emitted through the projection lens toward the screen, and wherein the dust-proof member is configured to mitigate an irregularity in an illuminance distribution of reflection light to be projected onto the screen.Type: ApplicationFiled: November 2, 2012Publication date: May 2, 2013Inventors: Takanobu OSAKA, Hibiki TATSUNO, Yasuyuki SHIBAYAMA, Kiichiro NISHINA, Makoto HIRAKAWA
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Publication number: 20130107233Abstract: An image displaying apparatus including a light source, an image displaying element configured to control exiting of incident light to display an image, an illumination optical system configured to illuminate the image displaying element with light exiting from the light source, and a projection optical system configured to project an image displayed on a display surface of the image displaying element, to provide an enlarged display. The projection optical system includes a lens optical system, a first mirror configured to reflect light transmitted through the lens optical system, and a second mirror configured to reflect light reflected from the first mirror toward the surface to be projected onto, and one of the mirrors is arranged at a position conjugate to the image displaying element, and wherein an optical surface of the one mirror is arranged to face vertically downward.Type: ApplicationFiled: October 31, 2012Publication date: May 2, 2013Inventors: Makoto Hirakawa, Hibiki Tatsuno, Takanobu Osaka, Yasuyuki Shibayama, Kiichiro Nishina
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Publication number: 20130044294Abstract: An image displaying apparatus including a light source, a light condenser for condensing light to form a condensed light image, a light mixing element, a reflective image displaying element having plural micro-mirrors for changing an inclination angle of an individual micro-mirror between an on-state and an off-state, an illumination optical system including a condenser lens and a mirror for illumination, and a projection optical system for projecting reflected light from a micro-mirror being at an on-state among plural micro-mirrors constituting the reflective image displaying element, wherein the mirror for illumination is at a position nearest the reflective image displaying element on an optical path from the light mixing element to the reflective image displaying element and a reflection surface of this mirror for illumination is positioned at a side of the reflective image displaying element with respect to a projection lens system constituting a part of the projection optical system.Type: ApplicationFiled: August 13, 2012Publication date: February 21, 2013Inventors: Yasuyuki Shibayama, Takanobu Osaka, Yoshio Kubo, Tetsuya Fujioka
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Patent number: 8162485Abstract: An image projection device performing pixel shift in synchronization with sequential updating of image data is disclosed that is able to start and stop pixel shift operations within a period of updating the image frames while maintaining brightness of the image. The image projection device has an intermediate image formation optical system including a light valve able to update an image frame in a line-sequential manner, a pixel shift unit to shift the light path of a light beam from the light valve so as to shift a position of an image formed on the light valve, and an intermediate image formation unit arranged on the light path between the light valve and the pixel shift unit for forming an intermediate image of the image on the light valve at a position of the pixel shift unit.Type: GrantFiled: January 30, 2006Date of Patent: April 24, 2012Assignee: Ricoh Company, Ltd.Inventors: Atsushi Takaura, Takanobu Osaka, Yasuyuki Takiguchi, Toshiaki Tokita, Kazuhiro Fujita, Kazuya Miyagaki, Hiroyuki Sugimoto
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Patent number: 7929071Abstract: A disclosed electric field generating device includes an electric field generating unit including a substrate, line electrodes, and an electric field generating resistor and configured to generate an electric field. In the disclosed electric field generating device, the line electrodes are formed on at least one side of the substrate in parallel with each other so as to divide the side of the substrate into multiple sections; the electric field generating resistor is shaped like a strip and positioned so as to touch a part of each of the line electrodes; and some of the line electrodes have connectors for electric connection.Type: GrantFiled: March 12, 2007Date of Patent: April 19, 2011Assignee: Ricoh Company, Ltd.Inventors: Yukiko Hirano, Toshiaki Tokita, Koh Fujimura, Yumi Matsuki, Toshimichi Hagiya, Takanobu Osaka, Masanori Kobayashi, Yohei Takano