Patents by Inventor Kouji Nishio

Kouji Nishio 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: 7261416
    Abstract: An eye's optical characteristics measuring system, comprising a target projecting means for projecting a target image on a fundus of an eye under test, a photodetecting means for guiding the target image toward a photoelectric detector, a pupil diameter measuring means, a calculating means for calculating optical characteristics of the eye under test according to distribution of optical intensity obtained based on an image acquired by the photoelectric detector, and an aperture selecting means provided on each of the target projecting means and the photodetecting means, wherein the aperture selecting means is independently driven, and apertures to restrict a projecting luminous flux and a photodetecting luminous flux are selected based on a pupil diameter of the eye under test measured by the pupil diameter measuring means.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: August 28, 2007
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Kouji Nishio, Gaku Takeuchi, Masahiro Shibutani, Katsuhiko Kobayashi
  • Patent number: 7244025
    Abstract: An eye's optical characteristics measuring system, comprising a first target projection optical system for projecting a target image on a fundus of an eye under test, a first photodetecting means for receiving the target image reflected from the fundus of the eye under test from the first target image projecting optical system, an ocular refractive power measuring unit for measuring ocular refractive power of the eye under test based on photodetection result from the first photodetecting means, a second target projecting means for projecting a spot-like target image to the fundus of the eye under test, a second photodetecting means for receiving the target image reflected from the fundus of the eye under test, and an eye's optical characteristics measuring unit for measuring ocular refractive power based on two or more images acquired at a predetermined refractive degree pitch before and after centering the refractive degree of the eye under test obtained by the second photodetecting means.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: July 17, 2007
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Kouji Nishio, Yasufumi Fukuma, Katsuhiko Kobayashi
  • Publication number: 20060256286
    Abstract: An eye's optical characteristics measuring system, comprising a first target projection optical system for projecting a target image on a fundus of an eye under test, a first photodetecting means for receiving the target image reflected from the fundus of the eye under test from the first target image projecting optical system, an ocular refractive power measuring unit for measuring ocular refractive power of the eye under test based on photodetection result from the first photodetecting means, a second target projecting means for projecting a spot-like target image to the fundus of the eye under test, a second photodetecting means for receiving the target image reflected from the fundus of the eye under test, and an eye's optical characteristics measuring unit for measuring ocular refractive power based on two or more images acquired at a predetermined refractive degree pitch before and after centering the refractive degree of the eye under test obtained by the second photodetecting means.
    Type: Application
    Filed: April 12, 2006
    Publication date: November 16, 2006
    Inventors: Kouji Nishio, Yasufumi Fukuma, Katsuhiko Kobayashi
  • Publication number: 20060215112
    Abstract: An eye's optical characteristics measuring system, comprising a target projecting means for projecting a target image on a fundus of an eye under test, a photodetecting means for guiding the target image toward a photoelectric detector, a pupil diameter measuring means, a calculating means for calculating optical characteristics of the eye under test according to distribution of optical intensity obtained based on an image acquired by the photoelectric detector, and an aperture selecting means provided on each of the target projecting means and the photodetecting means, wherein the aperture selecting means is independently driven, and apertures to restrict a projecting luminous flux and a photodetecting luminous flux are selected based on a pupil diameter of the eye under test measured by the pupil diameter measuring means.
    Type: Application
    Filed: February 13, 2006
    Publication date: September 28, 2006
    Inventors: Kouji Nishio, Gaku Takeuchi, Masahiro Shibutani, Katsuhiko Kobayashi
  • Publication number: 20060030229
    Abstract: A blended woven or knitted fabric which contains both highly fusible polyurethane elastic fibers exhibiting a retention of tenacity of 50% or above after the dry heat treatment at 150° C. for 45 s at 100% elongation and a melting point of 180° C. or below and at least one kind of non-elastic yarns and which is produced by fusing the polyurethane elasotomeric fibers to each other or the polyurethane elastic fibers to the non-elastic yarns at the crossover points by dry- or wet-heat setting; and a process for the production thereof.
    Type: Application
    Filed: December 10, 2003
    Publication date: February 9, 2006
    Inventors: Kunihiro Fukuoka, Kouji Nishio
  • Patent number: 6234630
    Abstract: A corneal endothelial cell measuring instrument comprises a monitor for displaying a corneal endothelial cell image picked up, an input device for marking the centers of cell images in the corneal endothelial cell image displayed on the screen of the monitor, a processor for determining the coordinate value of the marked centers, forming a closed curve formed by connecting the plurality of the marked centers, calculating the area of a region enclosed by the closed curve and calculating cell density, i.e., the number of cells per unit area, from the number of the centers on the closed curve and the number of the centers inside the closed curve.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: May 22, 2001
    Assignee: Kabushiki Kaisha Topcon
    Inventor: Kouji Nishio
  • Patent number: 6164778
    Abstract: A corneal endothelial cell photographing apparatus comprises a first slit plate provided with a slit, a photographing light projecting optical system for obliquely projecting photographing light for photographing a corneal endothelial cell of an eye to be tested through the slit of the first slit plate on the eye, an observation light projecting optical system for projecting observation light through the slit of the first slit plate on the eye for observation prior to photographing the corneal endothelial cell of the eye, an observing and photographing optical system for guiding the observation light reflected from the cornea of the eye and the photographing light reflected from the cornea of the eye to an image pickup device for the observation and photographing of the corneal endothelial cell of the eye, a second slit plate provided with a slit narrower than that of the first slit plate, and a Z-alignment measuring light projecting optical system for projecting alignment measuring light through the slit of
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: December 26, 2000
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Akinari Takagi, Kouji Nishio
  • Patent number: 5621488
    Abstract: An apparatus for ascertaining the number of cells of an endothelium of a cornea of a subject's eye includes a display for displaying an image of cells of an endothelium of a photographed cornea, square meshes for partitioning the image of the cells displayed on the display by the unit area, and an enlarging device for enlarging and displaying an area partitioned by one of the square meshes on the display. The square meshes and the image are correlatively moved in a right or left direction on the display. An operator counts the number of the cells per unit area in an enlarged image, so that the operator ascertains the total number of the cells of the corneal endothelium.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: April 15, 1997
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Yoshihiko Hanamura, Kouji Nishio, Yasufumi Fukuma
  • Patent number: 5436679
    Abstract: An apparatus for observing and photographing a corneal endothelium includes an illumination optical system 28 for projecting each illumination light emitted by a light source 30 for observation and a light source 32 for photography onto a cornea C of a subject's eye E at an angle, an observing and photographing optical system 29 for receiving scattered light reflected by the cornea C with the endothelial layer and observing and photographing it, and an optical system 1 for observing the anterior segment of the eye E. The observing and photographing optical system 29 is provided with a sensor 47 for detecting an image of the endothelium in focus.
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: July 25, 1995
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Hiroyuki Ohtsuka, Kenjirou Katsuragi, Masaru Sato, Kouji Nishio, Hiroshi Iijima
  • Patent number: 5430507
    Abstract: An ophthalmologic apparatus includes an optical system for illuminating a subject's eye, an optical system for observing the eye illuminated by the illumination optical system, an alignment detecting system for detecting the alignment of the observation optical system with the eye, and a switchover circuit for switching over a reference allowable range to another range. The observation optical system can observe the eye at at least two different magnifications. The alignment detecting system includes a sensor for receiving reflection light reflected by the eye, a circuit for setting a reference allowable range, an arithmetic circuit for processing a signal output by the sensor and detecting an alignment condition, and a judgment circuit for judging whether the alignment condition detected by the arithmetic circuit is within the reference allowable range set by the range setting circuit.
    Type: Grant
    Filed: November 26, 1993
    Date of Patent: July 4, 1995
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Kouji Nishio, Akio Morimoto
  • Patent number: 5381194
    Abstract: An apparatus for photographing a corneal endothelium of a patient's eye according to the invention includes an optical system for observing the anterior segment of the eye to align optical systems of the apparatus with the eye; an illumination optical system for projecting each illumination light emitted by a light source for observation and a light source for photography onto the cornea of the eye; an endothelium observing and photographing optical system for receiving reflected light from the corneal endothelium and observing and photographing it, the observing and photographing optical system including a reflected light receiving element for aligning the optical systems of the apparatus in the back and forth directions with the eye; display means for displaying images of the anterior segment and the corneal endothelium separately from each other; and image switching means for switching a displayed image from the anterior segment to the corneal endothelium and vice versa.
    Type: Grant
    Filed: February 5, 1993
    Date of Patent: January 10, 1995
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Kouji Nishio, Akio Morimoto
  • Patent number: 5183044
    Abstract: A noncontact type tonometer projects a fluid toward an eye-to-be-tested and obtains a measured value of eye pressure from a relation between transfigurations of the eye due to the fluid projection and the pressure projecting the fluid. A detecting circuit senses a pulse wave of the person-to-be-tested and a calculating circuit determines at least one of the maximum eye pressure value, minimum eye pressure value and average eye pressure value of the eye dependent on the maximum fluctuation width of the detected pulse wave, a fluctuating quantity of the detected pulse wave, and the measured eye pressure value. The calculation circuit determines the pulse wave fluctuating quantity at the time point when the eye pressure is measured. The pulse wave of the person may be measured at a position remote from the eye. The tonometer may also include a display for displaying the pulse wave and a display controller for displaying the time point when the eye pressure is measured.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: February 2, 1993
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Kouji Nishio, Yoshihiko Hanamura
  • Patent number: 5092334
    Abstract: A noncontact type tonometer projects a fluid toward an eye-to-be-tested and obtains a measured value of eye pressure from a relation between transfigurations of the eye due to the fluid projection and the pressure projecting of the fluid. A detecting circuit senses a pulse wave of the person-to-be-tested and a calculating circuit determines at least one of the maximum eye pressure value, minimum eye pressure value and average pressure value of the eye dependent on the maximum fluctuation width of the detected pulse wave, a fluctuating quantity of the detected pulse wave, and the measured eye pressure value. The calculation circuit determines the pulse wave fluctuating quantity at the time point when the eye pressure is measured. The pulse wave of the person may be measured at a position remote from the eye. The tonometer may also include a display for displaying the pulse wave and a display controller for displaying the time point when the eye pressure is measured.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: March 3, 1992
    Assignee: Tokyo Kogaku Kikai Kabushiki Kaisha
    Inventors: Kouji Nishio, Yoshihiko Hanamura
  • Patent number: 5042483
    Abstract: In a noncontact type tonometer including an air puff system for discharging fluid toward the cornea of an eye to be tested upon receipt of a projection signal and a pulse wave system for detecting the pulse of a patient which outputs an alternating voltage, the improvement comprising zero level detection system for detecting a zero level of the alternating voltage; and a timer which starts counting when the zero level has been detected by the zero detection systems and which outputs a projection signal to actuate the air puff system when the counted value has reached a preset time.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: August 27, 1991
    Assignee: Kabushiki Kaisha Topcon
    Inventor: Kouji Nishio
  • Patent number: 5033841
    Abstract: An ophthalmological instrument for the use of both corneal configuration and intraocular pressure measurement has alignment watching means for watching an alignment completion state upon receipt of an alignment completion signal which is output by alignment detecting means for detecting the alignment of an apparatus body with respect to an eye to be tested, corneal configuration measuring means for projecting a ring target mark onto the cornea of the eye and measuring a corneal configuration with reference to the ring target image, noncontact type intraocular pressure measuring means for discharging fluid toward the cornea in order to transfigure the cornea and measuring the intraocular pressure with reference to the amount of such transfiguration, and automatic executing means for executing the corneal configuration and intraocular pressure measurements in such a manner as that data of the ring target image is intaken in accordance with output of the alignment watching means in order to obtain data regarding
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: July 23, 1991
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Kouji Nishio, Hiroshi Iijima, Kenjiro Katsuragi, Yoshihiko Hanamura
  • Patent number: 4995393
    Abstract: An alignment apparatus of a noncontact type tonometer has a target projecting system for projecting light emitted from a light emitting source to an eye to be tested along the axial line of a fluid discharging nozzle for discharging fluid and forming a target image on the eye, and an alignment light receiving optical system for receiving the target image along the axial line of the nozzle and forming an image of the target image on a light receiving sensor. The alignment apparatus of a noncontact type tonometer is characterized in that the light emitting source comprises a first and a second light emitting sources, the light receiving sensor comprises an area sensor, and the apparatus further has a control unit adapted to detect the positions of the target images of the first and second light emitting sources formed on the area sensor and to output an alignment completion signal when such detected positions are within a preset range on the area sensor.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: February 26, 1991
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Kenjiro Katsuragi, Kouji Nishio
  • Patent number: 4872460
    Abstract: A noncontact type tonometer includes a fluid discharging device for discharging a fluid towards the cornea of an eye to be tested; an alignment detecting device for detecting an alignment between the axis of a fluid discharge of the fluid discharging device and the vertex of the cornea and for outputting an alignment signal; and a controlling device for determining whether or not the alignment has been completed upon receipt of the alignment signal from the alignment detecting device and outputting an alignment completion signal when the alignment has been completed. A fluid discharge of the fluid discharging device is automatically performed based on the alignment completion signal.
    Type: Grant
    Filed: August 19, 1987
    Date of Patent: October 10, 1989
    Assignee: Tokyo Kogaku Kikai Kabushiki Kaisha
    Inventors: Kouji Nishio, Yoshihiko Hanamura