Patents by Inventor Keigo Matsuo

Keigo Matsuo 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: 20190387963
    Abstract: A lens system is configured to form an image of an object on an imaging surface of an image sensor. A branching optical system is configured such that an image-forming light flux in the lens system is split and propagated into a plurality of optical paths having different optical path lengths and such that the principal rays of a plurality of image-forming light fluxes obtained after the splitting are incident on a predetermined region of the image sensor.
    Type: Application
    Filed: September 5, 2019
    Publication date: December 26, 2019
    Applicant: OLYMPUS CORPORATION
    Inventors: Keigo MATSUO, Hisashi ODE, Toshiro OKAMURA, Atsushi DOI, Satoshi WATANABE
  • Patent number: 10488820
    Abstract: A digital holographic image-taking apparatus includes an illumination portion having a light emission surface for emitting illumination light toward an object, the illumination light having a specific wavelength in a coherent plane waveform; and an image sensor having an pixel array including two-dimensionally arranged pixels, the image sensor capturing an interference pattern generated based on the illumination light having acted on the object, in which the following conditional expression is satisfied: 0.0000001<Z2/S<16, where S represents the area of the light emission surface, and Z represents the distance from the light emission surface to the pixel array.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: November 26, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Keigo Matsuo
  • Publication number: 20190086865
    Abstract: An illumination unit emits an illumination light to a specimen. An image sensor includes multiple pixels arranged in a two-dimensional manner. The image sensor captures an image of the intensity distribution of an interference pattern formed due to the illumination light that has interacted with the specimen, and outputs image data. A defect information acquisition unit acquires defect position information that indicates the positions of defective pixels of the image sensor. A processing unit reconstructs a subject image that represents the specimen based on the image data and the defect position information.
    Type: Application
    Filed: November 19, 2018
    Publication date: March 21, 2019
    Applicant: OLYMPUS CORPORATION
    Inventor: Keigo MATSUO
  • Publication number: 20180107159
    Abstract: Provided is a digital holographic image-taking apparatus, including: an illumination portion (10) having a light emission surface (14D) for emitting illumination light toward an object (1), the illumination light having a specific wavelength in a coherent plane waveform; and an image sensor (50) having an pixel array (51) including two-dimensionally arranged pixels, the image sensor (50) capturing an interference pattern generated based on the illumination light having acted on the object (1), in which the following conditional expression is satisfied: 0.0000001<Z2/S<16, where S represents the area of the light emission surface (14D), and Z represents the distance from the light emission surface (14D) to the pixel array (51).
    Type: Application
    Filed: December 15, 2017
    Publication date: April 19, 2018
    Applicant: OLYMPUS CORPORATION
    Inventor: Keigo MATSUO
  • Publication number: 20170168452
    Abstract: Provided are an illumination apparatus that allows a reduction in thickness and a display apparatus that uses the illumination apparatus. The illumination apparatus includes a laminated illumination portion formed by layering illumination portions that each emit illumination light as a plane wave with a different wavelength. The illumination portions include light sources that emit light of a predetermined wavelength, optical waveguides that propagate the light emitted from the light sources, and gratings that diffract the light propagating through the optical waveguides and emit the light as the illumination light.
    Type: Application
    Filed: February 17, 2017
    Publication date: June 15, 2017
    Applicant: OLYMPUS CORPORATION
    Inventor: Keigo MATSUO
  • Patent number: 9658429
    Abstract: A focus adjustment device comprises an image sensor having imaging pixels and focus detection pixels, which subjects light flux that is passed through a photographing lens to photoelectric conversion and outputs an image signal, a first memory which stores information relating to incident angle range of light flux that is incident towards the image sensor, a second memory which stores information relating to characteristics of the image sensor, and a calculation section which calculates information for focus adjustment based on output of the first memory and output of the second memory.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: May 23, 2017
    Assignee: Olympus Corporation
    Inventors: Kazumi Ito, Keigo Matsuo, Satoru Ito
  • Patent number: 9473693
    Abstract: A photographing apparatus has a body portion to which a lens portion is mountable and to which an image forming luminous flux is conducted from the lens portion, and the photographing apparatus includes an image pickup device having pixels for image pickup and pixels for focus detection, a storage section that retains information of sensitivity characteristics of the pixels for focus detection, and a control amount calculation section that obtains information about an incident angle and an angular range of the image forming luminous flux from the lens portion and calculates information for focus control based on the obtained information and information read from the storage section. The focus control of high precision is enabled with simple configuration, irrespective of a lens system.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: October 18, 2016
    Assignee: Olympus Corporation
    Inventors: Kazumi Ito, Keigo Matsuo
  • Publication number: 20160205312
    Abstract: A focus adjustment device comprises an image sensor having imaging pixels and focus detection pixels, which subjects light flux that is passed through a photographing lens to photoelectric conversion and outputs an image signal, a first memory which stores information relating to incident angle range of light flux that is incident towards the image sensor, a second memory which stores information relating to characteristics of the image sensor, and a calculation section which calculates information for focus adjustment based on output of the first memory and output of the second memory.
    Type: Application
    Filed: March 18, 2016
    Publication date: July 14, 2016
    Inventors: Kazumi ITO, Keigo MATSUO, Satoru ITO
  • Patent number: 9389401
    Abstract: Provided are a variable power optical system in which the value of the entire length with respect to the image height is reduced and the aberration is well corrected, and an image pickup device comprising the same. Specifically provided is a variable power optical system comprising, in order from the object side, at least a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power, wherein the variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element, the second lens element has a convex shape on the object side, and the final lens group comprises a positive lens, the variable power optical system satisfying the following conditional expression: 10?VdLg?45 ?1.0<(R2a?R2b)/(R2a+R2b)<1.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: July 12, 2016
    Assignee: OLYMPUS CORPORATION
    Inventors: Keigo Matsuo, Takayuki Mimura, Kanato Adachi, Hisashi Goto
  • Publication number: 20150264251
    Abstract: A photographing apparatus has a body portion to which a lens portion is mountable and to which an image forming luminous flux is conducted from the lens portion, and the photographing apparatus includes an image pickup device having pixels for image pickup and pixels for focus detection, a storage section that retains information of sensitivity characteristics of the pixels for focus detection, and a control amount calculation section that obtains information about an incident angle and an angular range of the image forming luminous flux from the lens portion and calculates information for focus control based on the obtained information and information read from the storage section. The focus control of high precision is enabled with simple configuration, irrespective of a lens system.
    Type: Application
    Filed: June 1, 2015
    Publication date: September 17, 2015
    Inventors: Kazumi ITO, Keigo MATSUO
  • Publication number: 20150085374
    Abstract: Provided are a variable power optical system in which the value of the entire length with respect to the image height is reduced and the aberration is well corrected, and an image pickup device comprising the same. Specifically provided is a variable power optical system comprising, in order from the object side, at least a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power, wherein the variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element, the second lens element has a convex shape on the object side, and the final lens group comprises a positive lens, the variable power optical system satisfying the following conditional expression: 10?VdLg?45 ?1.0<(R2a?R2b)/(R2a+R2b)<1.
    Type: Application
    Filed: November 17, 2014
    Publication date: March 26, 2015
    Applicant: OLYMPUS CORPORATION
    Inventors: Keigo MATSUO, Takayuki MIMURA, Kanato ADACHI, Hisashi GOTO
  • Patent number: 8964104
    Abstract: An image pickup apparatus of the invention includes: an optical imaging system; an image pickup device; a defocus quantity calculation section for calculating a defocus quantity based on a phase difference between signals for focus detection obtained from pixels for focus detection; a high-frequency component quantity detection section for detecting a quantity of high-frequency component contained in a pixel signal outputted from a pixel other than the pixels for focus detection; a region determination section for determining in accordance with which of the defocus quantity and the high-frequency component quantity the optical imaging system is to be driven, according to a detection result of detecting in which of a plurality of divided blocks of the image pickup device an object of interest is present; and a focusing section for driving the optical imaging system in accordance with a determination result of the region determination section.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: February 24, 2015
    Assignee: Olympus Corporation
    Inventors: Shingo Kato, Keigo Matsuo, Hisashi Goto
  • Patent number: 8917455
    Abstract: Provided are a variable power optical system in which the value of the entire length with respect to the image height is reduced and the aberration is well corrected, and an image pickup device comprising the same. Specifically provided is a variable power optical system comprising, in order from the object side, at least a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power, wherein the variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element, the second lens element has a convex shape on the object side, and the final lens group comprises a positive lens, the variable power optical system satisfying the following conditional expression: 10?VdLg?45 ?1.0<(R2a?R2b)/(R2a+R2b)<1.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: December 23, 2014
    Assignee: Olympus Corporation
    Inventors: Keigo Matsuo, Takayuki Mimura, Kanato Adachi, Hisashi Goto
  • Patent number: 8902349
    Abstract: An image pickup apparatus, includes a computing section which computes a defocus amount which has been estimated, a calculating section which calculates an accuracy of defocus detection, a setting section which sets a correction value from a result of the calculating section, a correcting section which corrects the correction value obtained from the result of the setting section, to reduce an absolute value of the defocus amount which has been estimated, a lens-drive amount calculating section which calculates a lens-drive amount based on a result from the correcting section, and a control section which, at the time of video photography, carries out focusing successively by using the defocus amount and the lens drive amount obtained from the computing section, the calculating section, the setting section, and the correcting section.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: December 2, 2014
    Assignee: Olympus Corporation
    Inventors: Keigo Matsuo, Hisashi Goto
  • Patent number: 8830379
    Abstract: The image pickup apparatus of the present invention includes: an optical imaging system for forming an object image; an image pickup device including a plurality of pixels that photoelectrically converts the object image; a defocus quantity calculation section for calculating a defocus quantity based on a phase difference between a plurality of signals for focus detection obtained from a plurality of pixels for focus detection that respectively receive a light flux that passes through a different pupil region of the optical imaging system; a focusing section for driving the optical imaging system so as to achieve an in-focus state, in accordance with the defocus quantity calculated at the defocus quantity calculation section; an addition practicability determination section for determining a practicability of performing inter-frame addition on a plurality of signals for focus detection before calculating the defocus quantity, based on an analysis result of a signal component of the object image; and an inter-
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: September 9, 2014
    Assignee: Olympus Corporation
    Inventors: Shingo Kato, Keigo Matsuo, Hisashi Goto
  • Patent number: 8810713
    Abstract: An image pickup apparatus includes: an image pickup device that includes a pixel used for focus detection, a plurality of the pixels being arranged in a matrix; a correction memory that stores correction information used for correcting a difference in amounts of received light that depend on pixel positions of the pixels used for focus detection; a correcting section that reads the correction information to correct a pixel value of the pixel used for focus detection; and a focus detecting section that detects a focal point by using the pixel value corrected by the correcting section. Focus accuracy is increased by correcting the pixel value for an AF pixel depending on the pixel position.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: August 19, 2014
    Assignees: Olympus Imaging Corp., Olympus Corporation
    Inventors: Keigo Matsuo, Hisashi Goto, Yoshikazu Ichikawa, Ryuhi Okubo, Hiroshi Takase, Toshio Takahashi, Daichi Murakami
  • Patent number: 8724010
    Abstract: An image pickup apparatus includes: an optical imaging system; an image pickup device; a defocus quantity calculation circuit for calculating a defocus quantity based on a phase difference between a plurality of signals for focus detection obtained from a plurality of pixels for focus detection that respectively receive a light flux that has passed through a different pupil region of the optical imaging system; a focusing section for driving the optical imaging system so as to achieve an in-focus state in accordance with the calculated defocus quantity; and a thinning-out circuit for thinning out a plurality of signals for focus detection that are not used for calculating the defocus quantity, based on an analysis result of a signal component of an object image.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: May 13, 2014
    Assignee: Olympus Corporation
    Inventors: Shingo Kato, Keigo Matsuo, Hisashi Goto
  • Publication number: 20140078375
    Abstract: Provided are a variable power optical system in which the value of the entire length with respect to the image height is reduced and the aberration is well corrected, and an image pickup device comprising the same. Specifically provided is a variable power optical system comprising, in order from the object side, at least a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power, wherein the variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element, the second lens element has a convex shape on the object side, and the final lens group comprises a positive lens, the variable power optical system satisfying the following conditional expression: 10?VdLg?45 ?1.0<(R2a?R2b)/(R2a+R2b)<1.
    Type: Application
    Filed: October 2, 2013
    Publication date: March 20, 2014
    Applicant: OLYMPUS CORPORATION
    Inventors: Keigo MATSUO, Takayuki MIMURA, Kanato ADACHI, Hisashi GOTO
  • Patent number: 8605179
    Abstract: An image pickup apparatus in which, a taking lens is installable or fixed, includes an image pickup element in which, pixels having a photoelectric conversion portion are arranged two dimensionally. The pixels include focal-point detection pixels which are arranged to restrict a direction of incidence of a light beam which is incident, and image-pickup pixels which are arranged such that, the direction of incidence of the light beam which is incident is not restricted more than the direction of incidence restricted by the focal-point detection pixel. The focal-point detection pixel outputs at least a signal for ranging, and the image-pickup pixel outputs at least a signal for an image. The image pickup apparatus includes an overflow judging section which judges whether or not the photoelectric conversion portion has overflowed, and a calculating section which calculates an amount of defocus based on a judgment result of the overflow judging section and the signal for ranging.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: December 10, 2013
    Assignee: Olympus Corporation
    Inventors: Toshiyuki Noguchi, Hisashi Goto, Keigo Matsuo
  • Patent number: 8564888
    Abstract: A variable power optical system includes, in order from the object side, a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power. The variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element. The second lens element has a convex shape on the object side. The final lens group includes a positive lens. The variable power optical system satisfies the following conditions: 10?VdLg?45 ?1.0<(R2a?R2b)/(R2a+R2b)<1.0 where VdLg is the Abbe number of the positive lens of the final lens group with respect to the d line, R2a is the curvature radius of the object-side surface of the second lens element, and R2b is the curvature radius of the image-side surface of the third lens element.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: October 22, 2013
    Assignee: Olympus Corporation
    Inventors: Keigo Matsuo, Takayuki Mimura, Kanato Adachi, Hisashi Goto