Patents by Inventor Fumikazu Hoshi

Fumikazu Hoshi 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).

  • Publication number: 20200183314
    Abstract: An optical sensor includes a light source; and an optical detector detecting intensity of light that is reflected by a recording medium, the light from the light source and irradiated onto the recording medium. Further, when an incident angle of the light incident to the recording medium from the light source relative to a normal line of the recording medium is given as ?1, a formula 75°??1?85° is satisfied.
    Type: Application
    Filed: February 12, 2020
    Publication date: June 11, 2020
    Applicant: RICOH COMPANY, LTD.
    Inventors: Toshihiro Ishii, Yoshihiro Oba, Fumikazu Hoshi, Satoru Sugawara
  • Patent number: 10606204
    Abstract: An optical sensor includes a light source; and an optical detector detecting intensity of light that is reflected by a recording medium, the light from the light source and irradiated onto the recording medium. Further, when an incident angle of the light incident to the recording medium from the light source relative to a normal line of the recording medium is given as ?1, a formula 75°??1?85° is satisfied.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: March 31, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshihiro Ishii, Yoshihiro Oba, Fumikazu Hoshi, Satoru Sugawara
  • Patent number: 10041927
    Abstract: An optical sensor including an abutment part configured to abut one edge of an object to be measured, a wall extending along a side of the object to be measured and having a first opening to pass light emitted to the object to be measured, and a first concave portion formed between the first opening and the abutment part on a side of the wall to position the object to be measured. A paper-type discrimination device including the optical sensor, and a controller configured to discriminate a paper type of the object using the reflection light from the object measured by the optical sensor. An image forming apparatus including the optical sensor or the paper-type discrimination device.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: August 7, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuma Goto, Fumikazu Hoshi, Yoshihiro Oba
  • Patent number: 10031457
    Abstract: An optical sensor including an irradiation system including an irradiation system including a light source unit having a light source, the irradiation system configured to emit a linearly polarized light of a first polarization direction onto a surface of an object, a polarizing optical element disposed on an optical path of the light that is emitted from the irradiation system and reflected by diffuse reflection from an incident plane of the object and configured to separate a linearly polarized light component of a second polarization direction, a first photodetector configured to receive the linearly polarized light component of the second polarization direction separated by the polarizing optical element, and a housing supporting the irradiation system, the polarizing optical element, and the first photodetector, where the light source unit is fixed to the housing in a light emitting direction of the light source unit via space.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: July 24, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihiro Oba, Fumikazu Hoshi, Kazuma Goto, Yoshihiro Misaka
  • Publication number: 20170261903
    Abstract: An optical sensor includes a light source; and an optical detector detecting intensity of light that is reflected by a recording medium, the light from the light source and irradiated onto the recording medium. Further, when an incident angle of the light incident to the recording medium from the light source relative to a normal line of the recording medium is given as ?1, a formula 75°??1?85° is satisfied.
    Type: Application
    Filed: May 19, 2017
    Publication date: September 14, 2017
    Applicant: RICOH COMPANY, LTD.
    Inventors: Toshihiro ISHII, Yoshihiro OBA, Fumikazu HOSHI, Satoru SUGAWARA
  • Patent number: 9696674
    Abstract: An optical sensor includes a light source; and an optical detector detecting intensity of light that is reflected by a recording medium, the light from the light source and irradiated onto the recording medium. Further, when an incident angle of the light incident the recording medium from the light source relative to a normal line of the recording medium is given as ?1, a formula 75°??1?85° is satisfied.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: July 4, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshihiro Ishii, Yoshihiro Oba, Fumikazu Hoshi, Satoru Sugawara
  • Patent number: 9678006
    Abstract: In an optical sensor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: June 13, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihiro Ohba, Satoru Sugawara, Toshihiro Ishii, Fumikazu Hoshi
  • Publication number: 20170003266
    Abstract: An optical sensor including an abutment part configured to abut one edge of an object to be measured, a wall extending along a side of the object to be measured and having a first opening to pass light emitted to the object to be measured, and a first concave portion formed between the first opening and the abutment part on a side of the wall to position the object to be measured. A paper-type discrimination device including the optical sensor, and a controller configured to discriminate a paper type of the object using the reflection light from the object measured by the optical sensor. An image forming apparatus including the optical sensor or the paper-type discrimination device.
    Type: Application
    Filed: September 15, 2016
    Publication date: January 5, 2017
    Inventors: Kazuma GOTO, Fumikazu HOSHI, Yoshihiro OBA
  • Publication number: 20160377540
    Abstract: In an optical sensor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Application
    Filed: September 9, 2016
    Publication date: December 29, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshihiro OHBA, Satoru SUGAWARA, Toshihiro ISHll, Fumikazu HOSHI
  • Patent number: 9513216
    Abstract: In an optical sensor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: December 6, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihiro Ohba, Satoru Sugawara, Toshihiro Ishii, Fumikazu Hoshi
  • Patent number: 9513218
    Abstract: An optical sensor includes a light source to illuminate a linear polarization in a first direction, a first optical detector disposed on a path of a light illuminated from the light source and specularly reflected by an object, a first optical element to separate the light reflected by the object into a linear polarization in the first direction and a linear polarization in a second direction orthogonal to the first direction, a second optical detector to receive the linear polarization in the second direction separated by the first optical element, and a processor to obtain an amount of the light specularly reflected by the object on the basis of an output signal of the first optical detector and an output signal of the second optical detector.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: December 6, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihiro Ohba, Satoru Sugawara, Toshihiro Ishii, Fumikazu Hoshi
  • Patent number: 9501018
    Abstract: An optical sensor including an abutment part configured to abut one edge of an object to be measured, a wall extending along a side of the object to be measured and having a first opening to pass light emitted to the object to be measured, and a first concave portion formed between the first opening and the abutment part on a side of the wall to position the object to be measured. A paper-type discrimination device including the optical sensor, and a controller configured to discriminate a paper type of the object using the reflection light from the object measured by the optical sensor. An image forming apparatus including the optical sensor or the paper-type discrimination device.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: November 22, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuma Goto, Fumikazu Hoshi, Yoshihiro Oba
  • Patent number: 9429513
    Abstract: A sensor apparatus includes an irradiation system with a light source configured to emit linearly polarized light of a first polarization direction onto a sheet-like object, in a direction oblique to a direction orthogonal to a surface of the object, a first photodetector arranged on an optical path of light that is emitted from the irradiation system and then is reflected at the object by regular reflection, a first optical element, arranged on an optical path of light reflected by diffuse reflection from an incidence plane of the object, configured to transmit linearly polarized light of a second polarization direction that is orthogonal to the first polarization direction, a second photodetector configured to receive light that has passed through the first optical element, and a detection unit configured to detect at least one of basis weight and thickness of the object.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: August 30, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kazuhiko Adachi, Yoshihiro Oba, Toshihiro Ishii, Fumikazu Hoshi, Sunao Chubachi, Yoshihiro Misaka
  • Publication number: 20160209794
    Abstract: An optical sensor including an irradiation system including an irradiation system including a light source unit having a light source, the irradiation system configured to emit a linearly polarized light of a first polarization direction onto a surface of an object, a polarizing optical element disposed on an optical path of the light that is emitted from the irradiation system and reflected by diffuse reflection from an incident plane of the object and configured to separate a linearly polarized light component of a second polarization direction, a first photodetector configured to receive the linearly polarized light component of the second polarization direction separated by the polarizing optical element, and a housing supporting the irradiation system, the polarizing optical element, and the first photodetector, where the light source unit is fixed to the housing in a light emitting direction of the light source unit via space.
    Type: Application
    Filed: January 20, 2016
    Publication date: July 21, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshihiro OBA, Fumikazu HOSHI, Kazuma GOTO, Yoshihiro MlSAKA
  • Publication number: 20160154356
    Abstract: An optical sensor including an abutment part configured to abut one edge of an object to be measured, a wall extending along a side of the object to be measured and having a first opening to pass light emitted to the object to be measured, and a first concave portion formed between the first opening and the abutment part on a side of the wall to position the object to be measured. A paper-type discrimination device including the optical sensor, and a controller configured to discriminate a paper type of the object using the reflection light from the object measured by the optical sensor. An image forming apparatus including the optical sensor or the paper-type discrimination device.
    Type: Application
    Filed: November 2, 2015
    Publication date: June 2, 2016
    Inventors: Kazuma GOTO, Fumikazu HOSHI, Yoshihiro OBA
  • Publication number: 20160109364
    Abstract: In an optical senor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Application
    Filed: December 21, 2015
    Publication date: April 21, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshihiro OHBA, Satoru SUGAWARA, Toshihiro ISHll, Fumikazu HOSHI
  • Patent number: 9274479
    Abstract: An optical sensor includes an irradiation system including a semiconductor laser having plural light-emitting parts; and at least one photodetector that detects an amount of light which is emitted from the irradiation system and reflected on a sheet-like object.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: March 1, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Fumikazu Hoshi, Yoshihiro Ohba
  • Patent number: 9267886
    Abstract: In an optical sensor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: February 23, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihiro Ohba, Satoru Sugawara, Toshihiro Ishii, Fumikazu Hoshi
  • Patent number: 9188530
    Abstract: A sensor is configured to include an optical sensor including a light source and a plurality of light receivers which receive light emitted from the light source and light regularly reflected and diffusely reflected by an object, a database including output data regarding multiple objects of known and different types from the plurality of light receivers when an incident direction of light emitted from the light source forms a first direction to the object and when the incident direction of light emitted from the light source forms a second direction which is orthogonal to the first direction, and a processor which controls the light emitted from the light source to illuminate an object of unknown type and specifies the type of the object by matching the output data of the plurality of light receivers to the database.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: November 17, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Fumikazu Hoshi, Satoru Sugawara, Toshihiro Ishii, Yoshihiro Ohba
  • Patent number: 9170190
    Abstract: A sensor device is disclosed, including a database, and a processing apparatus. The database includes, for multiple different first types of objects, a first output data which are output data of an optical system acquired beforehand for each of the first objects in a case in which a surface of one side of the first object is set as the detection surface; and a second output data which are output data of the optical detection system acquired beforehand for each of the first objects in a case in which a surface of an other side opposite to the one side of the first object is set as the detection surface. The processing apparatus matches measurement data with the database, the measurement data being the output data of the optical detection system which is acquired with respect to a second object, and determines a type of the second object.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: October 27, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kazuma Goto, Yoshihiro Oba, Fumikazu Hoshi, Toshihiro Ishii, Satoru Sugawara