Patents by Inventor Ryouta Ishikawa

Ryouta Ishikawa 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: 10802115
    Abstract: A light source emits light having a thin shape in a cross section viewed in the beam direction of the light. A light receiver includes a plurality of avalanche photodiodes each having a light receiving face that receives reflected light. The light receiving faces are disposed in an array at a predetermined interval along a longitudinal direction of the thin shape and the light receiver has a surface including the light receiving faces. An optical system guides the reflected light to the light receiver so that a focus point for a direction in which the light receiving faces are arrayed is set before the surface and a focus point for a perpendicular direction is set on the surface, the perpendicular direction being perpendicular to both the direction in which the light receiving faces are arrayed and the beam direction of the reflected light.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: October 13, 2020
    Assignee: Konica Minolta, Inc.
    Inventor: Ryouta Ishikawa
  • Patent number: 10782392
    Abstract: A scanning optical system, includes a mirror unit having a first mirror surface and a second mirror surface which incline to a rotation axis; and a light projecting system having a light source. A light flux emitted from the light source is reflected on the first mirror surface of the mirror unit, thereafter, reflected on the second mirror surface, and then, projected so as to scan in a main scanning direction onto an object in accordance with rotation of the mirror unit. The light flux emitted from the second mirror surface becomes a plurality of spot lights on the object side, and the plurality of spot lights are arranged along a direction intersecting with the main scanning direction.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: September 22, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Ryouta Ishikawa, Shoji Kogo
  • Patent number: 10746856
    Abstract: A light scanning type object detecting device includes a mirror unit in which first and second mirror surfaces are formed so as to incline in respective directions intersecting with a rotation axis and to face each other with a predetermined angle, a light source; and a light receiving element. On the assumption that H represents a distance between an intersection point of extension lines of lateral sides and a bottom side in the first mirror surface, r represents a radius of a received light flux, h represents a distance between the center of the received light flux and the bottom side, and H? represents a distance between a top side and the bottom side, formulas (1) and (2) are satisfied. when r<0.4H, 0.1<h/H?(H??r)/H??(1) when r?0.4H, 0.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: August 18, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kazutaka Noguchi, Ryouta Ishikawa, Kazuki Matsui
  • Patent number: 10649071
    Abstract: A scanning optical system, includes a mirror unit equipped with a first mirror surface and a second mirror surface each of which inclines to a rotation axis; and a light projecting system which includes at least one light source to emit a light flux toward the first mirror surface. A light flux emitted from the light source is reflected on the first mirror surface of the mirror unit, thereafter, reflected on the second mirror surface, and then, projected so as to scan in a main scanning direction onto an object in accordance with rotation of the mirror unit, and in a case where a direction included in a main scanning plane is set to 0 degree, the light flux reflected on the second mirror surface is polarized in a range within an angle of ±30 degrees to the main scanning plane.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: May 12, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Ryouta Ishikawa, Shoji Kogo
  • Patent number: 10605917
    Abstract: Provided is an object detection device which unlikely causes vignetting of a beam reflected from a mirror surface during rotation, and fully ensures object detection performance A light projecting system and a light receiving system are disposed so that a larger one of the area of a region on a mirror surface occupied by a beam emitted from a semiconductor laser and the area of a region on the mirror surface occupied by a beam incident on a photodiode has a longer movement length on the mirror surface during rotation than a smaller one.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: March 31, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Kazutaka Noguchi, Ryouta Ishikawa, Kazuki Matsui
  • Patent number: 10545223
    Abstract: An object detection device includes a first optical transceiver that generates a first beam flux and receives a scattered portion of the first beam flux, a second optical transceiver that generates a second beam flux and receives a scattered portion of the second beam flux, and a mirror unit that rotates around a rotation axis. The first beam flux is reflected by the mirror unit and is scanned based on the rotation of the mirror unit, and the scattered portion of the first beam flux is generated by scattering of the first beam flux by an object. The scattered portion of the first beam flux is reflected by the mirror unit before being received by a light receiving portion of the first optical transceiver, and the second beam flux is reflected by the mirror unit and is scanned based on the rotation of the mirror unit.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: January 28, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Shuhei Hayakawa, Hikaru Nagasawa, Masashi Kageyama, Ryouta Ishikawa
  • Patent number: 10495575
    Abstract: The present invention pertains to a surface plasmon enhanced fluorescence analysis device and a surface plasmon enhanced fluorescence measurement method which use GC-SPFS and make it possible to detect a substance to be detected with high sensitivity. This surface plasmon enhanced fluorescence measurement device has: a light source for irradiating the diffraction grating of a chip with excited light; a polarizer for removing linearly polarized light from fluorescent light emitted from a fluorescent substance on the diffraction grating; and a photodetector for detecting the linearly polarized light removed by the polarizer.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: December 3, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yukito Nakamura, Takatoshi Kaya, Kosuke Nagae, Akitoshi Nozaki, Fumio Nagai, Ryouta Ishikawa, Akiyuki Namatame
  • Patent number: 10288723
    Abstract: A mirror unit, a distance measurement device and a laser radar, and a mobile body and a fixed object having the mirror unit and the distance measurement device or the laser radar. The mirror unit includes a plurality of pairs of first reflecting surfaces and second reflecting surfaces inclined relative to a rotation axis, and extending in directions crossing each other. The mirror unit rotates about the rotation axis. In the mirror unit, a beam emitted from a light source is reflected on a first reflecting surface, and then reflected on a second reflecting surface paired with the first reflecting surface. The beam is scanned over an object with the rotation of the mirror unit. In the mirror unit, the first and second reflecting surfaces are formed, respectively, on first and second reflecting members which are combined to select an emission angle of a beam emitted from the mirror unit.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: May 14, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hideyuki Fujii, Ryouta Ishikawa, Naoki Kaneko, Daisuke Sawanobori
  • Publication number: 20190056481
    Abstract: Scanning optical system, comprising a rotatable mirror unit including first and second mirror surfaces each inclining relative to a rotation axis, and a light projecting system including a light source which emits light flux toward an object through the mirror unit. The light flux is reflected on the first mirror surface, then to the second mirror surface, and projected so as to scan on the object correspondingly to rotation of the mirror unit. The mirror unit includes multiples pairs of the first and second mirror surfaces, and the respective intersection angles of the multiples pairs are different from each other. In one rotation of the mirror unit, light flux emitted from the light source is reflected on the second mirror surfaces, and is projected sequentially, thereby to scan a measurement range in which the object is measured. Length in a sub scanning direction of the light flux and intersection angles of the multiples pairs correspond to length in a sub scanning direction of the measurement range.
    Type: Application
    Filed: August 21, 2018
    Publication date: February 21, 2019
    Inventors: Ryouta ISHIKAWA, Hiroyuki MATSUDA, Masashi KAGEYAMA, Junichiro YONETAKE, Hideyuki FUJII, Hiroyuki SHINDO
  • Patent number: 10162171
    Abstract: A scanning optical system, includes a mirror unit having a first mirror surface and a second mirror surface which incline to a rotation axis; and a light projecting system having a light source. A light flux emitted from the light source is reflected on the first mirror surface of the mirror unit, thereafter, reflected on the second mirror surface, and then, projected so as to scan in a main scanning direction onto an object in accordance with rotation of the mirror unit. In the case where a virtual plane is set in a range including the object, a light flux reflected on the second mirror surface has, upon entering the virtual plane, a cross sectional shape in which a length in a direction orthogonal to the main scanning direction is longer than a length in the main scanning direction.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: December 25, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Ryouta Ishikawa, Shoji Kogo
  • Publication number: 20180306906
    Abstract: A light scanning type object detecting device includes a mirror unit in which first and second mirror surfaces are formed so as to incline in respective directions intersecting with a rotation axis and to face each other with a predetermined angle, a light source; and a light receiving element. On the assumption that H represents a distance between an intersection point of extension lines of lateral sides and a bottom side in the first mirror surface, r represents a radius of a received light flux, h represents a distance between the center of the received light flux and the bottom side, and H? represents a distance between a top side and the bottom side, formulas (1) and (2) are satisfied. when r<0.4H, 0.1<h/H(H??r)/H ??(1) when r?0.4H, 0.
    Type: Application
    Filed: October 4, 2016
    Publication date: October 25, 2018
    Inventors: Kazutaka NOGUCHI, Ryouta ISHIKAWA, Kazuki MATSUI
  • Publication number: 20180299548
    Abstract: Provided is an object detection device which unlikely causes vignetting of a beam reflected from a mirror surface during rotation, and fully ensures object detection performance A light projecting system and a light receiving system are disposed so that a larger one of the area of a region on a mirror surface occupied by a beam emitted from a semiconductor laser and the area of a region on the mirror surface occupied by a beam incident on a photodiode has a longer movement length on the mirror surface during rotation than a smaller one.
    Type: Application
    Filed: October 4, 2016
    Publication date: October 18, 2018
    Inventors: Kazutaka NOGUCHI, Ryouta ISHIKAWA, Kazuki MATSUI
  • Publication number: 20180284015
    Abstract: A gas concentration measuring device that can accurately superimpose and display a gas concentration image and a background image so that a gas concentration distribution on the background image can be grasped at a glance. The gas concentration measuring device 1 includes an imaging camera 20 that captures an image of a background 100, a light source 12 that emits constant light to the background, a light receiver 14 that receives light of the light source 12, a gyro sensor 30 for detecting an irradiation spot of the light of the light source 12, and a control device 40 that generates a background image based on an image capturing result of the imaging camera 20, creates a gas concentration distribution based on a light receiving result of the light receiver 14 and a detection result of the gyro sensor 30, and superimposes the gas concentration distribution on the background image.
    Type: Application
    Filed: April 28, 2016
    Publication date: October 4, 2018
    Inventors: Kyuichiro IMADE, Masashi KAGEYAMA, Ryouta ISHIKAWA, Hikaru NAGASAWA
  • Patent number: 10078132
    Abstract: The present invention provides a scanning optical system and radar that can suppress longitudinal distortion and spot rotation of a spot light radiated on an object. A light flux emitted from a light source is reflected on a first mirror surface of a mirror unit, then, proceeds to a second mirror surface, further is reflected on the second mirror surface, and is projected so as to scan on an object correspondingly to rotation of the mirror unit. The light flux emitted from the light projecting system is made longer in a sub scanning angle direction than in a scanning angle direction in a measurement range of the object and satisfies the following conditional expression, |?1?90|×|?|?255 . . . (1); in the expression, ?1 is an intersection angle (°) between the first mirror surface and the second mirror surface, and ? is a rotation angle (°).
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: September 18, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Ryouta Ishikawa, Hiroyuki Matsuda, Masashi Kageyama, Junichiro Yonetake, Hideyuki Fujii, Hiroyuki Shindo
  • Patent number: 10048492
    Abstract: A scanning optical system, includes a mirror unit equipped with a first mirror surface and a second mirror surface each of which inclines to a rotation axis; and a light projecting system which includes at least one light source to emit a light flux toward the first mirror surface. A light flux emitted from the light source is reflected on the first mirror surface of the mirror unit, thereafter, reflected on the second mirror surface, and then, projected so as to scan in a main scanning direction onto an object in accordance with rotation of the mirror unit, and the light flux reflected on the second mirror surface is polarized in a range within an angle of ±30 degrees to a direction perpendicular to the main scanning direction on the object side.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: August 14, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Ryouta Ishikawa, Shoji Kogo
  • Publication number: 20180222581
    Abstract: The unmanned flying body is provided with a gas detector, a distance meter, and an altitude controller. The gas detector emits diagonally downward to the forward side in a moving direction of the unmanned flying body a detecting light frequency-modulated by a predetermined modulation frequency setting a predetermined frequency as a central frequency. The gas detector receives the light, returned from a measurement target to which the detecting light is emitted (an area on a pipe member for transferring gas, irradiated with the detecting light), as first light. The measurement target is checked for gas leakage based on the received first light. The distance meter measures the distance between the gas detector and the measurement target. The altitude controller controls the flight altitude of the unmanned flying body based on the measured distance.
    Type: Application
    Filed: July 26, 2016
    Publication date: August 9, 2018
    Applicant: Konica Minolta, Inc.
    Inventors: Hikaru NAGASAWA, Kyuichiro IMADE, Masashi KAGEYAMA, Ryouta ISHIKAWA
  • Publication number: 20180224530
    Abstract: A light source emits light having a thin shape in a cross section viewed in the beam direction of the light. A light receiver includes a plurality of avalanche photodiodes each having a light receiving face that receives reflected light. The light receiving faces are disposed in an array at a predetermined interval along a longitudinal direction of the thin shape and the light receiver has a surface including the light receiving faces. An optical system guides the reflected light to the light receiver so that a focus point for a direction in which the light receiving faces are arrayed is set before the surface and a focus point for a perpendicular direction is set on the surface, the perpendicular direction being perpendicular to both the direction in which the light receiving faces are arrayed and the beam direction of the reflected light.
    Type: Application
    Filed: July 7, 2016
    Publication date: August 9, 2018
    Inventor: Ryouta ISHIKAWA
  • Publication number: 20180202923
    Abstract: In a gas detection device and a gas detection method of the present invention, detection target gas is detected on the basis of reflected light of detection light (sensing light) frequency-modulated with respect to a center frequency and a distance to an object that generates the reflected light is measured. In the gas detection, an output signal of a light reception unit for receiving the reflected light is subjected to phase-sensitive detection. A synchronous detection timing of this phase-sensitive detection is adjusted on the basis of the measured distance to the object.
    Type: Application
    Filed: July 11, 2016
    Publication date: July 19, 2018
    Applicant: Konica Minolta, Inc.
    Inventors: Masashi KAGEYAMA, Hikaru NAGASAWA, Ryouta ISHIKAWA, Kyuichiro IMADE
  • Publication number: 20180164211
    Abstract: In a gas detection device and a gas detection method of the present invention, frequency-modulated detection light is irradiated while being scanned, a light reception output signal obtained by receiving reflected light of the detection light is subjected to phase-sensitive detection, a resulting detection output signal is sampled, and detection target gas GA is detected on the basis of a sampling result. A modulation frequency of the detection light is controlled on the basis of a scanning speed.
    Type: Application
    Filed: July 11, 2016
    Publication date: June 14, 2018
    Applicant: Konica Minolta, Inc.
    Inventors: Masashi KAGEYAMA, Hikaru NAGASAWA, Ryouta ISHIKAWA, Kyuichiro IMADE
  • Publication number: 20170307874
    Abstract: A scanning optical system, includes a mirror unit equipped with a first mirror surface and a second mirror surface each of which inclines to a rotation axis; and a light projecting system which includes at least one light source to emit a light flux toward the first mirror surface. A light flux emitted from the light source is reflected on the first mirror surface of the mirror unit, thereafter, reflected on the second mirror surface, and then, projected so as to scan in a main scanning direction onto an object in accordance with rotation of the mirror unit, and the light flux reflected on the second mirror surface is polarized in a range within an angle of ±30 degrees to a direction perpendicular to the main scanning direction on the object side.
    Type: Application
    Filed: October 6, 2015
    Publication date: October 26, 2017
    Applicant: KONICA MINOLTA, INC.
    Inventors: Ryouta ISHIKAWA, Shoji KOGO