Patents by Inventor Tadashi Nakamura

Tadashi Nakamura 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).

  • Patent number: 9229225
    Abstract: An optical scanning device includes a plurality of scanning optical systems that focus light beams deflected by an optical deflector onto corresponding scanning surfaces. The systems include a first scanning optical system and a second scanning optical system. The first scanning optical system and the second scanning optical system are disposed respectively at each side of a plane including a rotation axis of a polygonal-mirror optical deflector. Each of the scanning optical systems includes a synchronous detection optical system that determines a timing to start scanning the scanning surfaces with the light beams. When a time from the end of an effective scanning area in the second scanning optical system to synchronous detection in the first scanning optical system is Ta, and a time from the end of an effective scanning area in the first scanning optical system to synchronous detection in the second scanning optical system is Tb, Ta>Tb.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: January 5, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Yukio Itami, Tadashi Nakamura
  • Patent number: 9195062
    Abstract: Each scanning optical system includes a first scanning lens and a second scanning lens through which a light beam is incident onto the first scanning lens. The second scanning lens of each scanning optical system is disposed at the optically most downstream side in the scanning optical system and has an optical plane that has the strongest power in a sub-scanning corresponding direction. In addition, the optical plane of each second scanning lens, which has the strongest power in the sub-scanning corresponding direction, is located under the shaft bearings of neighboring polygon mirrors in the vertical direction.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: November 24, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Nobuyuki Arai, Makoto Hirakawa, Naoki Miyatake, Naoto Watanabe, Tadashi Nakamura
  • Publication number: 20150331108
    Abstract: An object detector and a sensing apparatus are provided. The object detector includes a light source, a light deflector configured to deflect light emitted from the light source, and a photodetector configured to detect the light that is deflected by the light deflector and then is reflected at an object, where the light deflector includes a plurality of reflection planes that rotate on a rotation axis, the reflection planes are oblique to the rotation axis and are rotationally symmetrical about the rotation axis, and the light that is emitted from the light source enters the light deflector in a direction parallel to the rotation axis. The sensing apparatus includes the object detector, and a monitoring controller configured to determine whether an object is present, and obtain movement information of the object including at least one of moving direction and moving speed of the object.
    Type: Application
    Filed: April 29, 2015
    Publication date: November 19, 2015
    Inventors: Yukio ITAMI, Shigeaki IMAI, Tadashi NAKAMURA
  • Patent number: 9188674
    Abstract: 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: Grant
    Filed: June 28, 2013
    Date of Patent: November 17, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shuichi Suzuki, Mitsuru Nakajima, Kenichi Yoshimura, Shigeaki Imai, Tadashi Nakamura, Hiroyoshi Funato
  • Publication number: 20150293051
    Abstract: In a gas sensor element 1 capable of detecting a concentration of a specific gas contained in a measuring target gas, an electrode 12 formed on a solid electrolyte body 11 having an oxygen ion conductivity is made of noble metal and solid electrolyte. The electrode 12 has a noble metal part 121 made of the noble metal, a solid electrolyte part 122 made of the solid electrolyte, and a mixture part 123 made of the noble metal and the solid electrolyte when a cross-sectional surface of the electrode 12 is observed. The mixture part 123 is formed along an interface part 120 between the noble metal part 121 and the solid electrolyte part 122.
    Type: Application
    Filed: November 18, 2013
    Publication date: October 15, 2015
    Inventors: Norikazu KAJIYAMA, Tadashi NAKAMURA
  • Publication number: 20150268332
    Abstract: An object detection device includes a light source unit that emits light toward an object positioned in a detection area, an optical deflector including a reflection surface to reflect light, which is emitted from the light source unit and reflected from the object, incident on the reflection surface, an optical system arranged on an optical path of the light reflected from the reflection surface, and a light-receiving unit configured to receive the light passed through the optical system. The optical system vignettes a part of one, which is incident on the reflection surface at a smaller incident angle than the other, of light reflected from the object in a first end portion of the detection area and light reflected from the object in a second end portion that is on the side opposite from the first end portion of the detection area.
    Type: Application
    Filed: March 16, 2015
    Publication date: September 24, 2015
    Inventor: Tadashi NAKAMURA
  • Publication number: 20150261120
    Abstract: An optical scanner includes a light source including a plurality of light emitting elements, a polygon mirror which deflects light from the light source for scanning a surface of a subject, an optical element arranged between the light source and the polygon mirror, having optical power in a sub scanning direction, a synchronous detector which detects the light deflected by the polygon mirror for synchronous detection and generates a signal for controlling a timing at which the scanning of the surface is started, and a fixing element which secures one end of the optical element. The light emitting elements of the light source are aligned with a certain tilt angle relative to the sub scanning direction. Light from one of the light emitting elements disposed closest to the fixing element in a main scanning direction is used for synchronous detection.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 17, 2015
    Inventors: Tomoya FUJII, Tadashi NAKAMURA, Nobuyuki ARAI, Yoshinobu SAKAUE, Noboru KUSUNOSE, Daisuke IMAKI
  • Patent number: 9097898
    Abstract: An optical scanning apparatus scans a target surface with a light beam along a main scanning direction. The apparatus includes a light source, an optical deflector which includes a rotating multi-faceted mirror, each surface of the multi-faceted mirror acting as a reflecting surface to deflect the light beam from the light source, and a scanning optical system configured to guide the light beam deflected by the optical deflector to the target surface. An angle which is formed between the light beam toward the reflecting surface of the optical deflector and the corresponding reflecting surface and which includes a reflected light reflected from the corresponding reflecting surface is always obtuse.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: August 4, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Tadashi Nakamura, Shingo Tachikawa, Naoto Watanabe
  • Publication number: 20150201899
    Abstract: In order to provide a technique for simplifying pre-examination input tasks for a medical image imaging apparatus, an imaging support system includes the medical image imaging apparatus 1 generating a medical image of the object 4, the position calculation unit 111 detecting a current position of the medical image imaging apparatus 1, the object candidate search unit 116 searching object candidates to be examined based on the current position, the operation unit 31 receiving a selection operation of an object to be examined from among object candidates, and the imaging condition setting unit 93 setting imaging conditions of the object to be examined.
    Type: Application
    Filed: September 11, 2013
    Publication date: July 23, 2015
    Applicant: Hitachi Medical Corporation
    Inventors: Hitoshi Uchinomiya, Tadashi Nakamura, Konosuke Temmei, Masakazu Okabe, Yuji Sakai
  • Patent number: 9072017
    Abstract: A wireless station includes a first wireless communication circuit, a second wireless communication circuit, and a control circuit. The first wireless communication circuit communicates by a first wireless communication system in a first cell which includes a first service area, and the second wireless communication circuit communicates by a second wireless communication system in a second cell which includes a second service area narrower than the first service area. The control circuit switches a communication system between the first wireless communication system and the second wireless communication system to control communication. When switching the communication system between the first wireless communication system and the second wireless communication system, the control circuit controls the first wireless communication circuit and the second wireless communication circuit to set a communication system which is used before the switching to an idle.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: June 30, 2015
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Tadashi Nakamura
  • Publication number: 20150160341
    Abstract: An object detector includes a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters, a light receiver which receives light emitted from the projector, and reflected by an object, and a light source driver which lights on and lights off each of the light emitter groups of the light source.
    Type: Application
    Filed: November 26, 2014
    Publication date: June 11, 2015
    Inventors: Kazuhiro AKATSU, Tadashi Nakamura, Kohji Sakai
  • Patent number: 9052444
    Abstract: The present invention relates to a production method for a product having a cured resin layer with a fine concave-convex structure formed on the surface of a substrate, the method including filling the space between a mold having a fine concave-convex structure composed of anodized alumina on the surface and a substrate with an active energy ray-curable resin composition, and curing the composition by irradiation with active energy rays, thereby forming a cured resin layer into which the fine concave-convex structure has been transferred on the surface of the substrate, wherein (A) the method includes treating the surface of the mold with a release agent, at least at transfer initiation, and (B) the active energy ray-curable resin composition includes a polymerizable compound, a polymerization initiator and a (poly)oxyethylene alkyl phosphate ester compound.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: June 9, 2015
    Assignee: MITSUBISHI RAYON CO., LTD.
    Inventors: Yusuke Nakai, Tadashi Nakamura, Tetsuya Jigami, Satoru Ozawa, Eiko Okamoto
  • Publication number: 20150124238
    Abstract: An object detecting apparatus includes: a light projection unit that is an array light source in which each of a plurality of light emission areas emits light, an optical scanning unit that performs scanning with the light, which is emitted from the light projection unit, in a first direction, and a light receiving unit that receives reflected light which is the light, with which the scanning is performed, being reflected by an object, and an object information acquiring unit that detects presence/absence of the object based on emission timing at which the light is emitted from the light projection unit and light receiving timing at which the light receiving unit receives the reflected light.
    Type: Application
    Filed: October 24, 2014
    Publication date: May 7, 2015
    Inventors: Kohji Sakai, Tadashi Nakamura
  • Publication number: 20150099841
    Abstract: A method of production of a nitrile copolymer rubber composition which contains a nitrile copolymer rubber, layered inorganic filler, vinyl chloride resin, and plasticizer including the steps of adding, to an aqueous dispersion of a vinyl chloride resin, 10 to 100 wt % of the total amount of plasticizer which is used and 0 to 100 wt % of the total amount of layered inorganic filler which is used to prepare an aqueous dispersion of a vinyl chloride resin which contains a plasticizer (A) and mixing an aqueous dispersion of a nitrile copolymer rubber (B) which may contain a plasticizer and/or layered inorganic filler and the aqueous dispersion of a vinyl chloride resin (A), then causing them to coagulate to form crumbs and filtering and drying the same is provided.
    Type: Application
    Filed: March 7, 2013
    Publication date: April 9, 2015
    Inventors: Akira Tsukada, Tomoyuki Shibuya, Yoshihisa Takeyama, Tadashi Nakamura
  • Publication number: 20150071406
    Abstract: To provide a method for controlling an X-ray image diagnostic apparatus and an X-ray generation device equipped with an ABS system tracking movement of an object position without an operator performing setting operation for a region of interest (ROI), the determination condition storage unit (6i) storing ROI position determination conditions in which image statistical information is used for defining conditions to determine a position of an ROI in an X-ray image out of plural blocks generated by dividing the X-ray image into plural regions, the first block statistical information calculation unit (6f) calculating the image statistical information for each of plural blocks, and the region-of-interest position selection unit (6g) selecting a block that serves as an ROI from among plural blocks using the ROI position determination conditions and the image statistical information of each block are provided.
    Type: Application
    Filed: March 18, 2013
    Publication date: March 12, 2015
    Applicant: Hitachi Medical Corporation
    Inventors: Konosuke Temmei, Yuji Sakai, Tadashi Nakamura
  • Patent number: 8928716
    Abstract: An optical scanning device includes: a light source device that emits five light beams corresponding to four basic colors and a single specific color; and five scanning optical systems corresponding the five light beams. One light beam in a first waveband among the light beams corresponding to the four basic colors enters one scanning optical system of the five scanning optical systems. The one scanning optical system includes a dichroic mirror that transmits a light beam in a second waveband different from the first waveband. An angle ?b formed between a normal to the incidence plane of the dichroic mirror and orthogonal projection to an assumed plane orthogonal to the main scanning corresponding direction of the incident path of the light beam to the incidence plane of the dichroic mirror is set at an angle of 0° or more and an angle of 45° or less.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: January 6, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Tadashi Nakamura, Toshiaki Tokita, Yukio Itami, Taku Amada, Shingo Tachikawa
  • Patent number: 8910700
    Abstract: A mold in which a fine uneven structure is formed on the surface by anodizing a surface of an aluminum base material having a purity of equal to or more than 99.5% by mass, wherein a 60-degree gloss of the surface on the side where a fine uneven structure is formed is equal to or more than 750%.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: December 16, 2014
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Katsuhiro Kojima, Tadashi Nakamura
  • Publication number: 20140209793
    Abstract: An object detector includes a light source; an optical system that converts a light beam emitted from the light source into a predetermined state; a deflector that deflects and scans the light beam passing through the optical system, and that irradiates the light beam onto an object; and a photo detector that detects reflected light or scattered light. A first size of a light emitting region of the light source is different from a second size of the light emitting region, wherein the first size is a first width of the light emitting region in a first direction, and the second size is a second width of the light emitting region in a second direction. One of the first direction and the second direction corresponding to a smaller one of the first size and the second size coincides with a direction in which angular resolution is higher.
    Type: Application
    Filed: January 10, 2014
    Publication date: July 31, 2014
    Inventors: Tadashi NAKAMURA, Shigeaki Imai
  • Patent number: 8743444
    Abstract: An optical scanning device that scans a plurality of surfaces to be scanned in a main scanning direction by using a light beam includes: a plurality of light sources; a light deflector that deflects a plurality of light beams emitted from the light sources; and a scanning optical system that individually guides each one of the light beams deflected by the light deflector to a corresponding one of the surfaces to be scanned. The scanning optical system includes one scanning lens shared by the light beams, and at least one surface of the scanning lens has a plurality of optical surfaces corresponding to the plurality of light beams disposed in a sub-scanning direction with a flat surface provided between the optical surfaces.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: June 3, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Naoki Miyatake, Tadashi Nakamura, Eiichi Hayashi, Chieko Hatashita, Go Takahashi
  • Publication number: 20140140606
    Abstract: In order to follow the ABS conditions when the movement of the object position, such as the movement of an object or the movement of an X-ray tube, occurs during fluoroscopy, an X-ray image diagnostic apparatus includes a histogram generation unit 6b that generates a histogram showing the distribution of brightness values of an X-ray image of an object; an object region detection unit 6c that detects an object region, which is a region where the object is imaged, in the X-ray image on the basis of the histogram; and an X-ray condition determination unit 2a that determines X-ray conditions defining an output of X-rays so that a brightness value representing the object region approaches a target brightness value of the object region set in advance.
    Type: Application
    Filed: July 12, 2012
    Publication date: May 22, 2014
    Applicant: HITACHI MEDICAL CORPORATION
    Inventors: Konosuke Temmei, Tadashi Nakamura, Yuji Sakai