Patents by Inventor Suguru Sangu

Suguru Sangu 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: 12241731
    Abstract: A displacement measurement device includes: an irradiation unit that irradiates a measurement object with coherent light; a luminance-change coordinate point detection unit that detects a luminance-change coordinate point where a luminance change has occurred, based on light reflected from the measurement object, and outputs data related to the luminance-change coordinate point; and circuitry that calculates an amount of displacement of the measurement object, based on the data related to the luminance-change coordinate point, by performing computations of a first numerical sequence and a second numerical sequence. The first numerical sequence includes a set of first elements each representing a location of the luminance-change coordinate point extracted from the data. The second numerical-sequence includes a set of second elements each representing a location of the luminance-change coordinate point extracted from the data.
    Type: Grant
    Filed: February 14, 2023
    Date of Patent: March 4, 2025
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuki Abe, Suguru Sangu, Toshiki Yamanaka, Ryo Saito
  • Publication number: 20250020452
    Abstract: A displacement measurement apparatus includes: a light emitter to emit coherent light to an object; a light position detector to detect an instantaneous intensity variation of an interference image of the object; and an interference imaging forming unit disposed between the object and the light position detector along an optical path of reflection light reflected from the object. The interference imaging forming unit forms the interference image with the reflection light reflected from the object and magnifies a point spread function of an optical system to magnify a size of a speckle particle of the interference image.
    Type: Application
    Filed: December 20, 2022
    Publication date: January 16, 2025
    Inventors: Suguru SANGU, Yuki ABE
  • Publication number: 20250013297
    Abstract: An inclination detector includes: multiple light emitters configured to emit multiple beams to an object: a photosensor having a light-receiving surface; and an output unit. The photosensor is configured to receive the multiple beams reflected from the object on the light-receiving surface and output an electrical signal based on light intensity of the multiple beams received on the light-receiving surface. The output unit configured to output a result of detection of a degree of inclination of the object based on the electrical signal output from the photosensor. The photosensor is disposed at a position at which the light intensity of the multiple beams that are emitted from the multiple light emitters, reflected at the object, and received at the photosensor changes according to the degree of inclination of the object.
    Type: Application
    Filed: December 8, 2022
    Publication date: January 9, 2025
    Inventors: Masato YOSHIKAWA, Suguru SANGU, Saori YOSHIDA
  • Patent number: 12130441
    Abstract: A retinal projection display device for projection of an image onto a retina of a wearer wearing an eyeglass-type support is provided. The retinal projection display device includes the eyeglass-type support including a temple; a light source; an optical scanner disposed in the temple and configured to scan light from the light source so as to form the image; a projector configured to project the image formed by the optical scanner onto the retina; an optical deflector disposed in the temple and configured to change a projection direction of the image formed by the optical scanner; and a translation member configured to translate the optical scanner and the optical deflector in a direction in which the temple extends.
    Type: Grant
    Filed: September 21, 2023
    Date of Patent: October 29, 2024
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shu Tanaka, Suguru Sangu, Kayoko Fujimura
  • Publication number: 20240111160
    Abstract: A retinal projection display device for projection of an image onto a retina of a wearer wearing an eyeglass-type support is provided. The retinal projection display device includes the eyeglass-type support including a temple; a light source; an optical scanner disposed in the temple and configured to scan light from the light source so as to form the image; a projector configured to project the image formed by the optical scanner onto the retina; an optical deflector disposed in the temple and configured to change a projection direction of the image formed by the optical scanner; and a translation member configured to translate the optical scanner and the optical deflector in a direction in which the temple extends.
    Type: Application
    Filed: September 21, 2023
    Publication date: April 4, 2024
    Inventors: Shu TANAKA, Suguru SANGU, Kayoko FUJIMURA
  • Patent number: 11914151
    Abstract: An optical device, a method of detecting inclination of a three-dimensional object, and a method of detecting a line-of-sight. The optical device includes a light source configured to irradiate an object with light, a detector configured to detect a position of the light reflected by the object, and circuitry configured to output data of a degree of inclination of the object obtained based on the position of the light and a prescribed parameter, and change the prescribed parameter based on the position of the light. The above methods include irradiating an object with light, detecting a position of the light reflected by the object, outputting data of a degree of inclination of the object obtained based on the position of the light and a prescribed parameter, and changing the prescribed parameter based on the position of the light.
    Type: Grant
    Filed: December 10, 2021
    Date of Patent: February 27, 2024
    Assignee: Ricoh Company, Ltd.
    Inventors: Saori Yoshida, Suguru Sangu
  • Patent number: 11803057
    Abstract: An optical device includes a light source section configured to emit light; a converging reflector configured to converge and reflect the light from the light source section to an irradiation surface having a curvature; and a position detector configured to detect a light-receptive position of the light reflected from the irradiation surface.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: October 31, 2023
    Assignee: RICOH COMPANY, LTD.
    Inventors: Suguru Sangu, Tatsuya Shimokawa, Kazuhiko Adachi, Shu Tanaka, Shuichi Suzuki
  • Publication number: 20230296369
    Abstract: A displacement measurement device includes: an irradiation unit that irradiates a measurement object with coherent light; a luminance-change coordinate point detection unit that detects a luminance-change coordinate point where a luminance change has occurred, based on light reflected from the measurement object, and outputs data related to the luminance-change coordinate point; and circuitry that calculates an amount of displacement of the measurement object, based on the data related to the luminance-change coordinate point, by performing computations of a first numerical sequence and a second numerical sequence. The first numerical sequence includes a set of first elements each representing a location of the luminance-change coordinate point extracted from the data. The second numerical-sequence includes a set of second elements each representing a location of the luminance-change coordinate point extracted from the data.
    Type: Application
    Filed: February 14, 2023
    Publication date: September 21, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuki Abe, Suguru Sangu, Toshiki Yamanaka, Ryo Saito
  • Publication number: 20220299762
    Abstract: An optical device, a method of detecting the degree of inclination of a three-dimensional object, and a method of detecting a line of sight. The optical device includes a plurality of light emitters configured to irradiate an object with light, a detector configured to detect the light reflected by the object and output a signal based on the light reflected by the object, and circuitry configured to output data of a degree of inclination of the object obtained based on an output signal output from the detector. In the optical device, the light emitted from the light emitter is temporally modulated by a code having orthogonality, and the plurality of light emitters include a first light emitter and a second light emitter. In the optical device, the first light emitter emits the light at a timing different from a timing at which the second light emitter emits the light.
    Type: Application
    Filed: March 3, 2022
    Publication date: September 22, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Masato Yoshikawa, Suguru Sangu, Saori Yoshida
  • Publication number: 20220236563
    Abstract: An optical device according to at least one embodiment of the present disclosure includes a projector configured to project scanning light that is light in a predetermined polarized state. The projector included in the optical device includes an optical member configured to selectively reflect the light in the predetermined polarized state.
    Type: Application
    Filed: June 24, 2020
    Publication date: July 28, 2022
    Inventors: Shu TANAKA, Suguru SANGU, Tatsuya SHIMOKAWA, Shuichi SUZUKI
  • Publication number: 20220221722
    Abstract: An optical device, a method of detecting inclination of a three-dimensional object, and a method of detecting a line-of-sight. The optical device includes a light source configured to irradiate an object with light, a detector configured to detect a position of the light reflected by the object, and circuitry configured to output data of a degree of inclination of the object obtained based on the position of the light and a prescribed parameter, and change the prescribed parameter based on the position of the light. The above methods include irradiating an object with light, detecting a position of the light reflected by the object, outputting data of a degree of inclination of the object obtained based on the position of the light and a prescribed parameter, and changing the prescribed parameter based on the position of the light.
    Type: Application
    Filed: December 10, 2021
    Publication date: July 14, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Saori Yoshida, Suguru Sangu
  • Patent number: 11334153
    Abstract: An optical device includes a light source that emits light to irradiate an object, a light emission driver that drives the light source to emit light at a predetermined light emission period, a position detector that outputs a detection signal corresponding to reflected light that is the light reflected by the object, and a signal extractor that extracts, from the detection signal, a signal with a period corresponding to the light emission period by using a reference signal with a period corresponding to the light emission period, and outputs the extracted signal.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: May 17, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Suguru Sangu, Tatsuya Shimokawa, Shu Tanaka, Shuichi Suzuki
  • Patent number: 10983592
    Abstract: An eyeball-tilt detecting device for detecting a tilt position of an eyeball, including: a light source array including a plurality of light emitting sections that emit light having directivity; an optical spot position detection element configured to detect an optical spot position of light reflected from an eyeball to output a detection signal; and processing circuitry configured to calculate a tilt position of the eyeball based on the detection signal output from the optical spot position detection element.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: April 20, 2021
    Assignee: Ricoh Company, Ltd.
    Inventor: Suguru Sangu
  • Publication number: 20200285058
    Abstract: An optical device includes a light source section configured to emit light; a converging reflector configured to converge and reflect the light from the light source section to an irradiation surface having a curvature; and a position detector configured to detect a light-receptive position of the light reflected from the irradiation surface.
    Type: Application
    Filed: March 6, 2020
    Publication date: September 10, 2020
    Inventors: Suguru SANGU, Tatsuya Shimokawa, Kazuhiko Adachi, Shu Tanaka, Shuichi Suzuki
  • Publication number: 20200174564
    Abstract: An optical device includes a light source that emits light to irradiate an object, a light emission driver that drives the light source to emit light at a predetermined light emission period, a position detector that outputs a detection signal corresponding to reflected light that is the light reflected by the object, and a signal extractor that extracts, from the detection signal, a signal with a period corresponding to the light emission period by using a reference signal with a period corresponding to the light emission period, and outputs the extracted signal.
    Type: Application
    Filed: November 20, 2019
    Publication date: June 4, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Suguru SANGU, Tatsuya SHIMOKAWA, Shu TANAKA, Shuichi SUZUKI
  • Publication number: 20190286228
    Abstract: An eyeball-tilt detecting device for detecting a tilt position of an eyeball, including: a light source array including a plurality of light emitting sections that emit light having directivity; an optical spot position detection element configured to detect an optical spot position of light reflected from an eyeball to output a detection signal; and processing circuitry configured to calculate a tilt position of the eyeball based on the detection signal output from the optical spot position detection element.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 19, 2019
    Inventor: Suguru Sangu
  • Patent number: 10180567
    Abstract: An optical modulator element includes a plurality of hole structure, a first liquid reservoir that stores a liquid to be propelled into the plurality of hole structure, a plurality of second liquid reservoirs that store the liquid to be propelled into the plurality of hole structure, and a movement control part that is arranged at at least one end of the second liquid reservoir that is closest to the first liquid reservoir and controls a movement of the liquid from the first liquid reservoir.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: January 15, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventor: Suguru Sangu
  • Patent number: 10110811
    Abstract: An imaging module has a spatial light modulation element which applies spatial modulation to an incident luminous flux and emits it; an image sensor which obtains the luminous flux to which the spatial modulation has been applied by the spatial light modulation element as image information; and a fixing part which integrally fixes the spatial light modulation element and the image sensor, and the fixing part has a gap-defining member which is arranged between the spatial light modulation element and the image sensor and forms a gap structure having a certain distance, and an imaging device includes the imaging module.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: October 23, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventor: Suguru Sangu
  • Publication number: 20160316142
    Abstract: An imaging module has a spatial light modulation element which applies spatial modulation to an incident luminous flux and emits it; an image sensor which obtains the luminous flux to which the spatial modulation has been applied by the spatial light modulation element as image information; and a fixing part which integrally fixes the spatial light modulation element and the image sensor, and the fixing part has a gap-defining member which is arranged between the spatial light modulation element and the image sensor and forms a gap structure having a certain distance, and an imaging device includes the imaging module.
    Type: Application
    Filed: January 8, 2015
    Publication date: October 27, 2016
    Applicant: Ricoh Company, Ltd.
    Inventor: Suguru Sangu
  • Publication number: 20150260982
    Abstract: An optical modulator element includes a plurality of hole structure, a first liquid reservoir that stores a liquid to be propelled into the plurality of hole structure, a plurality of second liquid reservoirs that store the liquid to be propelled into the plurality of hole structure, and a movement control part that is arranged at at least one end of the second liquid reservoir that is closest to the first liquid reservoir and controls a movement of the liquid from the first liquid reservoir.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 17, 2015
    Inventor: Suguru SANGU