Patents by Inventor Yasufumi Yamada

Yasufumi Yamada 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: 11808855
    Abstract: An optical device includes a light source provided with a plurality of surface-emitting laser elements to emit a laser beam, a scanner to scan the laser beam emitted from the light source, and an optical system disposed in an optical path between the light source and the scanner and to guide the laser beam to the scanner. The optical system includes a first optical element to control a divergence angle of the laser beam emitted from the light source and a second optical element to concentrate the laser beam that has passed through the first optical element onto a to-be-scanned surface of the scanner.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: November 7, 2023
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshiyuki Ikeoh, Yasufumi Yamada, Atsushi Sakai, Naoto Jikutani, Tsuyoshi Ueno, Nobunari Tsukamoto, Tadashi Nakamura, Kazuma Izumiya, Shuichi Suzuki
  • Patent number: 11579289
    Abstract: A distance measuring apparatus includes a light source to emit light beams, an optical scanner to scan the light beams output from the light source over a predetermined range, a light receiver to receive reflected light obtained as a result of the light beams being reflected by a target object, and to output detection signals, and a control circuit to measure a distance to the target object based on the detection signals. The light source including a plurality of light-emitting device groups that are arranged in a scan direction of a scan performed by the optical scanner, and the control circuit being to make the plurality of light-emitting device groups emit light at respective different timings in a single scan, and to measure the distance to the target object based on a sum of the detection signals.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: February 14, 2023
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shuichi Suzuki, Nobunari Tsukamoto, Tsuyoshi Ueno, Tadashi Nakamura, Naoto Jikutani, Kazuma Izumiya, Atsushi Sakai, Masayuki Yanagihashi, Yasufumi Yamada
  • Publication number: 20210165101
    Abstract: An optical device includes a light source provided with a plurality of surface-emitting laser elements to emit a laser beam, a scanner to scan the laser beam emitted from the light source, and an optical system disposed in an optical path between the light source and the scanner and to guide the laser beam to the scanner. The optical system includes a first optical element to control a divergence angle of the laser beam emitted from the light source and a second optical element to concentrate the laser beam that has passed through the first optical element onto a to-be-scanned surface of the scanner.
    Type: Application
    Filed: February 1, 2019
    Publication date: June 3, 2021
    Inventors: Toshiyuki IKEOH, Yasufumi YAMADA, Atsushi SAKAI, Naoto JIKUTANI, Tsuyoshi UENO, Nobunari TSUKAMOTO, Tadashi NAKAMURA, Kazuma IZUMIYA, Shuichi SUZUKI
  • Publication number: 20190250270
    Abstract: A distance measuring apparatus includes a light source to emit light beams, an optical scanner to scan the light beams output from the light source over a predetermined range, a light receiver to receive reflected light obtained as a result of the light beams being reflected by a target object, and to output detection signals, and a control circuit to measure a distance to the target object based on the detection signals. The light source including a plurality of light-emitting device groups that are arranged in a scan direction of a scan performed by the optical scanner, and the control circuit being to make the plurality of light-emitting device groups emit light at respective different timings in a single scan, and to measure the distance to the target object based on a sum of the detection signals.
    Type: Application
    Filed: February 8, 2019
    Publication date: August 15, 2019
    Inventors: Shuichi SUZUKI, Nobunari Tsukamoto, Tsuyoshi Ueno, Tadashi Nakamura, Naoto Jikutani, Kazuma Izumiya, Atsushi Sakai, Masayuki Yanagihashi, Yasufumi Yamada
  • Patent number: 9445062
    Abstract: An imaging device includes: a filter formed of four different filter regions with four different spectral transmittances that three different spectral transmittances having characteristics of a color matching function and a spectral transmittance for extracting metallic black have been linearly transformed thereinto by a linear transformation matrix; and an imaging unit that takes an image of light which has come out from a subject, and has been collected by an optical system, and then has passed through the filter.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: September 13, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Nobuyuki Satoh, Yasufumi Yamada, Hiroaki Kotera
  • Publication number: 20150146053
    Abstract: An imaging device includes: a filter formed of four different filter regions with four different spectral transmittances that three different spectral transmittances having characteristics of a color matching function and a spectral transmittance for extracting metallic black have been linearly transformed thereinto by a linear transformation matrix; and an imaging unit that takes an image of light which has come out from a subject, and has been collected by an optical system, and then has passed through the filter.
    Type: Application
    Filed: November 24, 2014
    Publication date: May 28, 2015
    Applicant: Ricoh Company, Ltd.
    Inventors: Nobuyuki Satoh, Yasufumi Yamada, Hiroaki Kotera
  • Patent number: 8760501
    Abstract: A stereo camera apparatus includes a first image capturing unit having first and second lens units, a first light synthesis unit, a first area-divided filter, and a first image capturing element. The first light synthesis unit and the first area-divided filter guide S-polarized and P-polarized light components to the first image capturing element. The second image capturing unit includes third and fourth lens units, a second light synthesis unit, a second area-divided filter, and a second image capturing element. The second light synthesis unit and the second area-divided filter guide S-polarized and P-polarized light components to the second image capturing element. The control unit includes first and second controllers to compute three-dimensional data of object using the S-polarized and P-polarized light component images, respectively.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: June 24, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeru Oohchida, Shin Aoki, Masahiro Fujimoto, Hideaki Hirai, Yasufumi Yamada, Nobuhiro Morita
  • Patent number: 8049138
    Abstract: An apparatus for processing a three-dimensional structure having a fine three-dimensional shape and a smooth surface is disclosed in which the three-dimensional structure is usable for an optical device. The process method includes depositing a thin layer for absorption of laser light on a flat substrate; depositing a transparent layer on the thin layer for absorption of laser light; and irradiating a process laser light, passing through the transparent layer; in which pulse injection energy of the process laser light is set to be the same as or smaller than the maximum pulse injection energy capable of exposing a surface of the thin layer in front in the incident direction of the process laser light, and to be set the same as or greater than the minimum pulse injection energy capable of removing the transparent layer in rear in the incident direction of the process laser light.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: November 1, 2011
    Assignees: Ricoh Company, Ltd., Riken
    Inventors: Yasufumi Yamada, Katsumi Midorikawa, Hiroshi Kumagai
  • Patent number: 7910869
    Abstract: A laser processing apparatus includes a laser source (11), a spatial phase modulator (13) configured to modulate a phase of a laser beam emitted from the laser source, a synthetic data generator (17) configured to generate synthetic data by combining hologram image data representing a pattern image to be processed with position displacement hologram data for shifting the pattern image to a prescribed position, the synthetic data being input to the spatial phase modulator for the phase modulation of the laser beams, and a focusing optical unit (14) configured to guide the phase-modulated laser beam onto a surface to be processed to reproduce the pattern image on the processed surface.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: March 22, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Manabu Seo, Yasufumi Yamada, Yoshihiro Norikane
  • Publication number: 20100283837
    Abstract: A stereo camera apparatus includes first and second image capturing units and a control unit. The first image capturing unit includes first and second lens units, a first light synthesis unit, a first area-divided filter, and a first image capturing element. The first light synthesis unit and the first area-divided filter guide S-polarized and P-polarized light components to the first image capturing element to detect S-polarized and P-polarized light component images. The second image capturing unit includes third and fourth lens units, a second light synthesis unit, a second area-divided filter, and a second image capturing element. The second light synthesis unit and the second area-divided filter guide S-polarized and P-polarized light components to the second image capturing element to detect S-polarized and P-polarized light component images.
    Type: Application
    Filed: May 10, 2010
    Publication date: November 11, 2010
    Inventors: Shigeru OOHCHIDA, Shin Aoki, Masahiro Fujimoto, Hideaki Hirai, Yasufumi Yamada, Nobuhiro Morita
  • Patent number: 7693662
    Abstract: A drive recorder stores information regarding a dangerous location where a vehicle collision or a dangerous driving situation occurred in the past. When it is determined that the vehicle approaches the dangerous location based on a position signal from a GPS receiver for detecting the present position of the vehicle, a warning is provided to the vehicle driver. According to the warning, the vehicle driver can recognize that the vehicle is approaching the dangerous location where the vehicle collision or the dangerous driving situation occurred in the past.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: April 6, 2010
    Assignee: DENSO CORPORATION
    Inventor: Yasufumi Yamada
  • Patent number: 7679499
    Abstract: A warning system warns a driver of a vehicle that a vehicle location in a record of previously detected drive operation that indicates a violation of a safety standard and a current position of the vehicle are determined to be within a predetermined distance from each other based on repeated detections of a current vehicle position by a detector and a detection of the drive operation that indicates the violation of the safety standard transmitted through an interface from a drive recorder. In this manner, the warning system for warning the driver lightens a process load of a unit that performs a position detection process and a unit that performs a record keeping process.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: March 16, 2010
    Assignee: DENSO CORPORATION
    Inventor: Yasufumi Yamada
  • Patent number: 7636633
    Abstract: A remote control device in a vehicle is provided in proximity of a driver's seat such that an operation unit of the remote control device is manually rotated and pressed by a hand of a driver in a driver's seat. A case of the remote control device contains vibrators to vibrate left and right sides of the remote control device. A navigation device is connected to a control unit of the remote control device. When a position of the vehicle approaches a specified guidance point during route guidance, the navigation device outputs a guidance signal (left-turn or right-turn instruction) to the control unit. When supplied with the guidance signal, the control unit controls driving of the vibrators to vibrate the remote control device based on the guidance signal.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: December 22, 2009
    Assignee: DENSO CORPORATION
    Inventor: Yasufumi Yamada
  • Publication number: 20090147330
    Abstract: A laser processing apparatus includes a laser source (11), a spatial phase modulator (13) configured to modulate a phase of a laser beam emitted from the laser source, a synthetic data generator (17) configured to generate synthetic data by combining hologram image data representing a pattern image to be processed with position displacement hologram data for shifting the pattern image to a prescribed position, the synthetic data being input to the spatial phase modulator for the phase modulation of the laser beams, and a focusing optical unit (14) configured to guide the phase-modulated laser beam onto a surface to be processed to reproduce the pattern image on the processed surface.
    Type: Application
    Filed: October 12, 2005
    Publication date: June 11, 2009
    Inventors: Manabu Seo, Yasufumi Yamada, Yoshihiro Norikane
  • Patent number: 7518086
    Abstract: A plurality of configurations is simultaneously formed in a material by a single laser beam having a desired distribution pattern of wavelengths. An input laser beam has an initial wavelength distribution pattern. The initial wavelength distribution pattern is adjusted or modified into a desired final wavelength distribution pattern. For example, the initial wavelength distribution pattern is a wide range of wavelengths in a single bell-curve distribution while the desired final wavelength distribution pattern has a specific number of sharp peaks each over a predetermined narrow range. The laser beam having the desired final wavelength distribution pattern is focused upon on a material. Because of the multiple peaks in the wavelength distribution, the laser beam is focused at a plurality of the focal distances. A number of structures is simultaneously formed in a material at the multiple focal points or at multiple locations/depths when the above laser beam is projected onto the material.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: April 14, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Norikane, Manabu Seo, Yasufumi Yamada
  • Patent number: 7482052
    Abstract: A laser processing method where laser beam for processing is irradiated on a processing object and the laser beam for processing directly removes a part of the processing object. The processing object is made of a glass substrate, metal thin film having high absorption to laser beam for processing is formed on a surface of glass substrate, into which laser beam for processing is made incident, the laser beam for processing is irradiated from a surface of metal thin film, and matter is directly removed by irradiation of laser beam onto the processing object in order to form a region finer than an irradiation region of laser beam for processing on the processing object.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: January 27, 2009
    Assignees: Ricoh Company, Ltd., Riken
    Inventors: Yasufumi Yamada, Katsumi Midorikawa, Hiroshi Kumagai
  • Publication number: 20080305787
    Abstract: An administration management system for managing vehicles includes plural vehicle units and plural cellular phones respectively having common codes for correspondence between vehicle units and cellular phones. When the common code matches, the vehicle unit and the cellular phone perform an automatic connection procedure and administration management information acquired by the vehicle unit is transmitted to a center unit through a broad range network from the cellular phone. The cellular phone and the vehicle unit are prevented from being connected with each other in an erroneous manner without undergoing complicated connection procedure so as to establish appropriate communication for transmission of administration management information by using the common code assigned thereto.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 11, 2008
    Applicant: DENSO CORPORATION
    Inventors: Yasufumi Yamada, Yasuyuki Itoh, Hideki Sakoh, Tetsuya Oki
  • Patent number: 7343127
    Abstract: A mark forming method for a moving body is disclosed. The method includes the steps of forming a second material layer, which scatters second wavelength light by being dispersed a first material that has a light absorbing property for first wavelength light therein, on a moving body; irradiating the first wavelength light on a part of the second material layer, making the first material at the part absorb the first wavelength light, and changing a scattering property of the part of the second material layer; and forming a mark whose scattering property for the second wavelength light is different in the part.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: March 11, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasufumi Yamada, Koichi Kudo
  • Publication number: 20080059054
    Abstract: A drive recorder stores information regarding a dangerous location where a vehicle collision or a dangerous driving situation occurred in the past. When it is determined that the vehicle approaches the dangerous location based on a position signal from a GPS receiver for detecting the present position of the vehicle, a warning is provided to the vehicle driver. According to the warning, the vehicle driver can recognize that the vehicle is approaching the dangerous location where the vehicle collision or the dangerous driving situation occurred in the past.
    Type: Application
    Filed: August 16, 2007
    Publication date: March 6, 2008
    Applicant: DENSO CORPORATION
    Inventor: Yasufumi Yamada
  • Publication number: 20080048850
    Abstract: A warning system warns a driver of a vehicle that a vehicle location in a record of previously detected drive operation that indicates a violation of a safety standard and a current position of the vehicle are determined to be within a predetermined distance from each other based on repeated detections of a current vehicle position by a detector and a detection of the drive operation that indicates the violation of the safety standard transmitted through an interface from a drive recorder. In this manner, the warning system for warning the driver lightens a process load of a unit that performs a position detection process and a unit that performs a record keeping process.
    Type: Application
    Filed: July 19, 2007
    Publication date: February 28, 2008
    Applicant: DENSO CORPORATION
    Inventor: Yasufumi Yamada