Patents by Inventor Hiroyoshi Funato
Hiroyoshi Funato 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: 9983531Abstract: A moving-member detecting device includes an image acquiring unit and a speed calculating unit. The image acquiring unit includes a light source configured to emit a light beam to a detecting position of a moving member; an area sensor configured to acquire image data of a one- or two-dimensional image; and an area-sensor control unit configured to acquire the image data. The image acquiring unit is configured to acquire pieces of image data of the moving member at first and second positions, respectively, in a moving direction of the moving member so as to acquire the piece of position image data for the second position when the moving member is at the second position after acquiring the piece of image data for the first position. The speed calculating unit is configured to calculate a moving speed of the moving member from the pieces of image data.Type: GrantFiled: August 2, 2013Date of Patent: May 29, 2018Assignee: Ricoh Company, LimitedInventors: Koichi Kudo, Koji Masuda, Hiroyoshi Funato, Takeshi Ueda, Yasuhiro Nihei, Atsushi Takaura
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Patent number: 9304228Abstract: An object detection apparatus includes an incident optical system, which includes light source units and a combining unit combining light beams emitted from the light source units; a deflection unit including rotating reflection parts that deflect the light beams to scan and be irradiated on a predetermined range of an object; an imaging unit forming an image based on the light from the predetermined range of the object; and an optical detection unit detecting the object based on the light received via the imaging unit. Further the combining unit combines the light beams such that each of the combined light beams passes a single light path when projected onto a predetermined plane, and each of the light paths exists outside a region of the deflection unit when projected onto the first plane.Type: GrantFiled: July 31, 2013Date of Patent: April 5, 2016Assignee: RICOH COMPANY, LTD.Inventors: Tadashi Nakamura, Shigeaki Imai, Shuichi Suzuki, Mitsuru Nakajima, Kenichi Yoshimura, Hiroyoshi Funato
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Patent number: 9188674Abstract: Disclosed is a laser radar device including a modulated light beam generator that emits light beams to a target, a photodetector that receives reflected light; a reflected light condenser that condenses the reflected light; a rotator that rotates around a rotation axis; and mirrors included in the rotator that scan the light beams, and guide the reflected light to the reflected light condenser, wherein an angular detection range in a vertical direction is divided into a plurality of layers, wherein mirror surfaces of the mirrors are tilted by corresponding tilt angles relative to the rotation axis, the tilt angles being different from each other, wherein the modulated light beam generator emits the light beams in the vertical direction, the light beams having different emission angles, and wherein a difference between the emission angles corresponds to the angular detection range of one layer in the vertical direction.Type: GrantFiled: June 28, 2013Date of Patent: November 17, 2015Assignee: RICOH COMPANY, LTD.Inventors: Shuichi Suzuki, Mitsuru Nakajima, Kenichi Yoshimura, Shigeaki Imai, Tadashi Nakamura, Hiroyoshi Funato
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Publication number: 20140044460Abstract: A moving-member detecting device includes an image acquiring unit and a speed calculating unit. The image acquiring unit includes a light source configured to emit a light beam to a detecting position of a moving member; an area sensor configured to acquire image data of a one- or two-dimensional image; and an area-sensor control unit configured to acquire the image data. The image acquiring unit is configured to acquire pieces of image data of the moving member at first and second positions, respectively, in a moving direction of the moving member so as to acquire the piece of position image data for the second position when the moving member is at the second position after acquiring the piece of image data for the first position. The speed calculating unit is configured to calculate a moving speed of the moving member from the pieces of image data.Type: ApplicationFiled: August 2, 2013Publication date: February 13, 2014Applicant: Ricoh Company, LimitedInventors: Koichi KUDO, Koji MASUDA, Hiroyoshi FUNATO, Takeshi UEDA, Yasuhiro NIHEI, Atsushi TAKAURA
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Publication number: 20140034817Abstract: An object detection apparatus includes an incident optical system, which includes light source units and a combining unit combining light beams emitted from the light source units; a deflection unit including rotating reflection parts that deflect the light beams to scan and be irradiated on a predetermined range of an object; an imaging unit forming an image based on the light from the predetermined range of the object; and an optical detection unit detecting the object based on the light received via the imaging unit. Further the combining unit combines the light beams such that each of the combined light beams passes a single light path when projected onto a predetermined plane, and each of the light paths exists outside a region of the deflection unit when projected onto the first plane.Type: ApplicationFiled: July 31, 2013Publication date: February 6, 2014Inventors: Tadashi NAKAMURA, Shigeaki Imai, Shuichi Suzuki, Mitsuru Nakajima, Kenichi Yoshimura, Hiroyoshi Funato
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Publication number: 20140009747Abstract: Disclosed is a laser radar device including a modulated light beam generator that emits light beams to a target, a photodetector that receives reflected light; a reflected light condenser that condenses the reflected light; a rotator that rotates around a rotation axis; and mirrors included in the rotator that scan the light beams, and guide the reflected light to the reflected light condenser, wherein an angular detection range in a vertical direction is divided into a plurality of layers, wherein mirror surfaces of the mirrors are tilted by corresponding tilt angles relative to the rotation axis, the tilt angles being different from each other, wherein the modulated light beam generator emits the light beams in the vertical direction, the light beams having different emission angles, and wherein a difference between the emission angles corresponds to the angular detection range of one layer in the vertical direction.Type: ApplicationFiled: June 28, 2013Publication date: January 9, 2014Applicant: RICOH COMPANY, LTD.Inventors: Shuichi SUZUKI, Mitsuru NAKAJIMA, Kenichi YOSHIMURA, Shigeaki IMAI, Tadashi NAKAMURA, Hiroyoshi FUNATO
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Patent number: 8587774Abstract: A velocity detecting device includes an image-pattern acquiring unit that includes a laser light source and an area sensor that acquires a one-dimensional or a two-dimensional image. The image-pattern acquiring unit includes a lens between a moving member and the area sensor, irradiates a beam emitted from the laser light source to the moving member to make a scattering light of the moving member scattered from the moving member on the area sensor by using the lens, and acquires an image pattern at a predetermined time interval in association with movement of the moving member. A velocity calculating unit calculates the velocity of the moving member by computing the image pattern acquired by the image-pattern acquiring unit. The lens is a reduced optical system that projects a reduced object onto the area sensor.Type: GrantFiled: January 29, 2010Date of Patent: November 19, 2013Assignee: Ricoh Company, Ltd.Inventors: Hiroyoshi Funato, Shigeaki Imai, Koji Masuda, Hidemasa Suzuki
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Patent number: 8373736Abstract: P-polarized light beam passing through an f? lens passes through a polarization beam splitter, is converted into S-polarized light beam by a quarter-wave plate and a reflecting mirror, re-enters the polarization beam splitter, and is reflected at the polarization beam splitter in the ?Z direction. An optical path of a light beam between a polygon mirror and the f? lens, between the f? lens and the polarization beam splitter, between the polarization beam splitter and the quarter-wave plate, between the quarter-wave plate and a reflecting mirror, between the reflecting mirror and the quarter-wave plate, and between the quarter-wave plate and the polarization beam splitter are in the same plane.Type: GrantFiled: August 4, 2009Date of Patent: February 12, 2013Assignee: Ricoh Company, Ltd.Inventors: Hiroyoshi Funato, Kazunori Bannai, Daisuke Imaki, Yoshinori Hayashi, Makoto Hirakawa
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Patent number: 8045249Abstract: An optical scanning device including a light source, a deflection device to deflect a light beam from the light source, an image focus optical system to focus the light beam deflected by the deflection device on a scanned surface to form an image thereon and scan a surface by the light beam deflected by deflection device to form an image thereon, a light path switching device provided between the light source and the deflection device, which switches a light path of the light beam emitted from the light source to deflect the light beam on different timings such that the light beam scans different surfaces.Type: GrantFiled: June 4, 2008Date of Patent: October 25, 2011Assignee: Ricoh Company, Ltd.Inventors: Masanori Kobayashi, Hiroyoshi Funato, Kazuya Miyagaki
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Publication number: 20100310284Abstract: A velocity detecting device includes an image-pattern acquiring unit that includes a laser light source and an area sensor that acquires a one-dimensional or a two-dimensional image. The image-pattern acquiring unit includes a lens between a moving member and the area sensor, irradiates a beam emitted from the laser light source to the moving member to make a scattering light of the moving member scattered from the moving member on the area sensor by using the lens, and acquires an image pattern at a predetermined time interval in association with movement of the moving member. A velocity calculating unit calculates the velocity of the moving member by computing the image pattern acquired by the image-pattern acquiring unit. The lens is a reduced optical system that projects a reduced object onto the area sensor.Type: ApplicationFiled: January 29, 2010Publication date: December 9, 2010Inventors: Hiroyoshi Funato, Shigeaki Imai, Koji Masuda, Hidemasa Suzuki
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Publication number: 20100034563Abstract: P-polarized light beam passing through an f? lens passes through a polarization beam splitter, is converted into S-polarized light beam by a quarter-wave plate and a reflecting mirror, re-enters the polarization beam splitter, and is reflected at the polarization beam splitter in the ?Z direction. An optical path of a light beam between a polygon mirror and the f? lens, between the f? lens and the polarization beam splitter, between the polarization beam splitter and the quarter-wave plate, between the quarter-wave plate and a reflecting mirror, between the reflecting mirror and the quarter-wave plate, and between the quarter-wave plate and the polarization beam splitter are in the same plane.Type: ApplicationFiled: August 4, 2009Publication date: February 11, 2010Inventors: Hiroyoshi Funato, Kazunori Bannai, Daisuke Imaki, Yoshinori Hayashi, Makoto Hirakawa
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Publication number: 20080297870Abstract: An optical scanning device including a light source, a deflection device to deflect a light beam from the light source, an image focus optical system to focus the light beam deflected by the deflection device on a scanned surface to form an image thereon and scan a surface by the light beam deflected by the deflection device to form an image thereon, a light path switching device provided between the light source and the deflection device, which switches a light path of the light beam emitted from the light source to deflect the light beam on different timings such that the light beam scans different surfaces.Type: ApplicationFiled: June 4, 2008Publication date: December 4, 2008Applicant: RICOH COMPANY, LTD.Inventors: Masanori KOBAYASHI, Hiroyoshi Funato, Kazuya Miyagaki
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Patent number: 7242839Abstract: An optical delay element including a photonic crystal line defect optical waveguide is disclosed that has a large group refractive index and has small or nearly constant wavelength dispersion of the group refractive index in a wide wavelength region for practical use. The optical delay element includes a line defect optical waveguide formed in a photonic crystal structure, and the volume of the line defect optical waveguide is less than the volume of a single line defect optical waveguide. Thereby, the waveguide band of the line defect optical waveguide has two zero points in the third order dispersion curve of the line defect optical waveguide, and the sign of the third order dispersion curve is inverted near the zero points.Type: GrantFiled: March 23, 2005Date of Patent: July 10, 2007Assignees: Ricoh Company, Ltd., Toshihiko BabaInventors: Atsushi Sakai, Ikuo Katoh, Hiroyoshi Funato, Toshihiko Baba
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Patent number: 7177258Abstract: An optical pickup apparatus used in an optical data recording/reproducing apparatus for reading/reproducing data on an optical recording medium, including a light source, a diffracting device configured to transmit a light beam and to diffract a light beam reflected from the optical recording medium, an optical device having a reflecting portion and a transmitting portion configured to reflect one part of the light beam emitted from the light source and to transmit another part of the light beam to the optical recording medium and from the optical recording medium, and a photodetecting device to detect the light beam from the optical recording medium for signal light detection, and the light beam reflected by the reflecting portion of the optical device for monitor light detection of the light source.Type: GrantFiled: October 25, 2004Date of Patent: February 13, 2007Assignee: Ricoh Company, Ltd.Inventors: Shigeru Ohuchida, Hiroyoshi Funato
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Patent number: 7164532Abstract: A polarization diffraction grating includes two media having different orientation states arranged alternately and cyclically, wherein each boundary between the media forms an oblique rectangular shape.Type: GrantFiled: April 16, 2003Date of Patent: January 16, 2007Assignee: Ricoh Company, Ltd.Inventors: Hiroyoshi Funato, Junichi Kitabayashi, Shigeru Oohchida, Tsuyoshi Suzudo
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Publication number: 20060083472Abstract: An optical delay element including a photonic crystal line defect optical waveguide is disclosed that has a large group refractive index and has small or nearly constant wavelength dispersion of the group refractive index in a wide wavelength region for practical use. The optical delay element includes a line defect optical waveguide formed in a photonic crystal structure, and the volume of the line defect optical waveguide is less than the volume of a single line defect optical waveguide. Thereby, the waveguide band of the line defect optical waveguide has two zero points in the third order dispersion curve of the line defect optical waveguide, and the sign of the third order dispersion curve is inverted near the zero points.Type: ApplicationFiled: March 23, 2005Publication date: April 20, 2006Inventors: Atsushi Sakai, Ikuo Katoh, Hiroyoshi Funato, Toshihiko Baba
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Publication number: 20060055993Abstract: A method of producing a hologram element is disclosed that is able to prevent spread of a polymerization reaction and light leakage during exposure with interference light, and improve productivity in mass production. The hologram element is for transmitting, reflecting, diffracting, or scattering incident light, and includes a pair of substrates, an isolation member between the substrates that forms an isolated region, and a photo-sensitive recording material sealed in the isolated region. The hologram element includes a periodic structure formed by exposing the recording material to interference light. The interference light is generated by two or more light beams, or by using a master hologram. The recording material is formed from a composite material including a polymerized polymer or a polymerized liquid crystal. The periodic structure is formed by exposing the recording material to the interference light to induce the polymerization reaction and phase separation in the composite material.Type: ApplicationFiled: September 9, 2005Publication date: March 16, 2006Inventors: Masanori Kobayashi, Hiroyuki Sugimoto, Kazuya Miyagaki, Hiroyoshi Funato
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Patent number: 6876621Abstract: An optical pickup apparatus used in an optical data recording/reproducing apparatus for reading/reproducing data on an optical recording medium, including a light source, a diffracting device configured to transmit a light beam and to diffract a light beam reflected from the optical recording medium, an optical device having a reflecting portion and a transmitting portion configured to reflect one part of the light beam emitted from the light source and to transmit another part of the light beam to the optical recording medium and from the optical recording medium, and a photodetecting device to detect the light beam from the optical recording medium for signal light detection, and the light beam reflected by the reflecting portion of the optical device for monitor light detection of the light source.Type: GrantFiled: March 8, 2001Date of Patent: April 5, 2005Assignee: Ricoh Company, Ltd.Inventors: Shigeru Ohuchida, Hiroyoshi Funato
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Publication number: 20050058051Abstract: An optical pickup apparatus used in an optical data recording/reproducing apparatus for reading/reproducing data on an optical recording medium, including a light source, a diffracting device configured to transmit a light beam and to diffract a light beam reflected from the optical recording medium, an optical device having a reflecting portion and a transmitting portion configured to reflect one part of the light beam emitted from the light source and to transmit another part of the light beam to the optical recording medium and from the optical recording medium, and a photodetecting device to detect the light beam from the optical recording medium for signal light detection, and the light beam reflected by the reflecting portion of the optical device for monitor light detection of the light source.Type: ApplicationFiled: October 25, 2004Publication date: March 17, 2005Inventors: Shigeru Ohuchida, Hiroyoshi Funato
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Patent number: 6822771Abstract: An optical pickup unit includes a light source of semiconductor laser chips of different light-emission wavelengths; a plurality of holograms placed between the light source and an optical recording medium, the holograms including at least one non-polarization hologram having a substantially uniform diffraction efficiency irrespective of the direction of polarization of incident light and at least one polarization hologram having a diffraction efficiency varying depending on the direction of polarization of incident light; and a wave plate provided between the optical recording medium and the polarization hologram. The returning beam of a light beam emitted from a selected one of the semiconductor laser chips is diffracted by the corresponding one of said holograms to be received by a light-receiving element. The wave plate turns the direction of polarization of the returning beam to a different direction from that of the emitted light beam.Type: GrantFiled: September 26, 2002Date of Patent: November 23, 2004Assignee: Ricoh Company, Ltd.Inventors: Hiroyoshi Funato, Shigeru Oohchida