Patents by Inventor Eiichi Yanagi

Eiichi Yanagi 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: 20200288967
    Abstract: An eye chart presentation device includes a display to display an eye chart image on a screen, a reflection mirror to reflect light flux emitted from the display, and a convex lens system to form a virtual image of the eye chart image from the light flux reflected by the reflection mirror, the focal length of the convex lens system being greater than 800 mm. The screen is positioned within the focal length of the convex lens system, and the display emits the light flux from a lateral direction with respect to sightline of the eye. The reflection mirror includes a first mirror to directly reflect the light flux from the display and a second mirror to reflect the light flux reflected by the first mirror to the convex lens system.
    Type: Application
    Filed: March 12, 2020
    Publication date: September 17, 2020
    Inventor: Eiichi YANAGI
  • Patent number: 9717408
    Abstract: An ophthalmologic imaging apparatus includes: a first optical system that applies an accommodation stimulus to a subject's eye; a tomographic image forming unit that includes a second optical system that splits light from a light source into signal light and reference light, and detects interference light between the signal light having travelled via the subject's eye and the reference light, and creates a tomographic image of the subject's eye based on a detection result of the interference light; and an analyzer that compares a first tomographic image with a second tomographic image to acquire change information indicating a change in a tissue of the subject's eye due to an accommodation stimulus change. The first and second tomographic images are respectively created by the tomographic image forming unit for the subject's eye, to which first and second accommodation stimuli are respectively applied by the first and second optical systems.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: August 1, 2017
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Masahiro Akiba, Yasufumi Fukuma, Hiroshi Akiyama, Hisashi Tsukada, Eiichi Yanagi
  • Publication number: 20150320308
    Abstract: An ophthalmologic imaging apparatus includes: a first optical system that applies an accommodation stimulus to a subject's eye; a tomographic image forming unit that includes a second optical system that splits light from a light source into signal light and reference light, and detects interference light between the signal light having travelled via the subject's eye and the reference light, and creates a tomographic image of the subject's eye based on a detection result of the interference light; and an analyzer that compares a first tomographic image with a second tomographic image to acquire change information indicating a change in a tissue of the subject's eye due to an accommodation stimulus change. The first and second tomographic images are respectively created by the tomographic image forming unit for the subject's eye, to which first and second accommodation stimuli are respectively applied by the first and second optical systems.
    Type: Application
    Filed: December 4, 2013
    Publication date: November 12, 2015
    Inventors: Masahiro AKIBA, Yasufumi FUKUMA, Hiroshi AKIYAMA, Hisashi TSUKADA, Eiichi YANAGI
  • Patent number: 7715023
    Abstract: A jig mounting apparatus has a detection optical system that detects reference marker of an eyeglass lens, is configured so as to determine an mounting point based on the reference marker detected by the detection optical system and position the mounting center of jig, which is used in processing the eyeglass lens, on the mounting point to mount the jig on the surface of the eyeglass lens, in which the detection optical system includes: a focusing optical system that focuses a light-emitting optical flux from a light source on the surface of the eyeglass lens, where hidden marks are formed, via an aperture stop; a reflection plate that reflects an optical flux focused by the focusing optical system and passed through the eyeglass lens; and an imaging device that is provided on a position optically approximately conjugate with the aperture stop and configured to focus on a space portion along an optical axis direction from the surface of the eyeglass lens.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: May 11, 2010
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Eiichi Yanagi, Takahiro Watanabe, Yoshimasa Ogawa, Tsutomu Kikawa, Kazuo Kitamura, Yasuo Suzuki, Kenichi Watanabe
  • Publication number: 20090030299
    Abstract: A non-contact type tonometer includes a air injector for blowing air to a cornea of a subject's eye along a reference axis to deform the cornea, a projection optical system for projecting projection light onto the subject's eye, a light-receiving optical system for receiving reflected light which is projected from the projection optical system and reflected on the subject's eye, an alignment unit for positioning the projection optical system and the light-receiving optical system in the direction of the reference axis based on a light amount of the reflected light which is received by the light-receiving optical system and an intraocular pressure detector for detecting a deformation of the cornea based on the reflected light amount. The projection optical system includes a light flux shape regulator which regulates the projection light such that the projection light has a non-circular shape extending in a predetermined direction.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 29, 2009
    Inventors: Tomoko Naito, Eiichi Yanagi, Hideo Sagehashi
  • Publication number: 20080231794
    Abstract: A jig mounting apparatus has a detection optical system that detects reference marker of an eyeglass lens, is configured so as to determine an mounting point based on the reference marker detected by the detection optical system and position the mounting center of jig, which is used in processing the eyeglass lens, on the mounting point to mount the jig on the surface of the eyeglass lens, in which the detection optical system includes: a focusing optical system that focuses a light-emitting optical flux from a light source on the surface of the eyeglass lens, where hidden marks are formed, via an aperture stop; a reflection plate that reflects an optical flux focused by the focusing optical system and passed through the eyeglass lens; and an imaging device that is provided on a position optically approximately conjugate with the aperture stop and configured to focus on a space portion along an optical axis direction from the surface of the eyeglass lens.
    Type: Application
    Filed: March 31, 2005
    Publication date: September 25, 2008
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventors: Eiichi Yanagi, Takahiro Watanabe, Yoshimasa Ogawa, Tsutomu Kikawa, Kazuo Kitamura, Yasuo Suzuki, Kenichi Watanabe
  • Patent number: 7341349
    Abstract: An optometric apparatus 2 according to the present invention comprises a body portion 5r provided with an optical system for a right eye for projecting a chart for the right eye in order to inspect visual function of both eye of an examinee and a body portion 5l provided with an optical system for a left eye for projecting a chart for the left eye, the optical systems for the right and left eyes projecting the same fusion patterns to perform fusion of the both eyes of the examinee.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: March 11, 2008
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Yasufumi Fukuma, Kohji Nishio, Takefumi Hayashi, Eiichi Yanagi, Noriyuki Nagai, Yasuo Kato, Yukio Ikezawa, Mineki Hayafuji, Tadashi Okamoto, Masakazu Hayashi
  • Patent number: 7301614
    Abstract: A lens-refracting characteristic measuring apparatus includes a measuring optical device to measure refracting characteristics of eyeglass lenses, an input device to input a pupillary distance of eyes of a person wearing eyeglasses, and an arithmetic and control circuit for obtaining refracting characteristics of the eyeglass lenses in positions of centers of right and left pupils of the person wearing the eyeglasses based on the pupillary distance of right and left eyes of the person wearing the eyeglasses input by the input device and the refracting characteristics measured by the measuring optical device.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: November 27, 2007
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Eiichi Yanagi, Shinichi Nakamura
  • Patent number: 7280191
    Abstract: A lens meter that measures optical characteristics of lenses of an eyeglass unit and an inspection glass unit, including a glass unit support, light sources, light-projecting and -detecting optical systems, light detectors, and inspection glass frame adaptors for the inspection glass unit. The support includes two sandwiching members displaceable to sandwich an outer peripheral portion of the eyeglass unit, and the adaptors can be fitted to and detached from the sandwiching members. The adaptors include projecting sandwiching portions projecting toward opposite sandwiching members when the adaptors are fitted to the sandwiching members and which contact portions of the inspection glass unit's frame, other than movable areas of tabs of detachable lenses projecting from a frame of an inspection glass lens unit supported by the support as the eyeglass unit, whereas adaptor portions other than the projecting sandwiching portions do not interfere with the movable areas of the tabs.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: October 9, 2007
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Eiichi Yanagi, Shinichi Nakamura
  • Patent number: 7088439
    Abstract: A lens meter having a measurement optical system including a light-emitting optical system, emitting a measurement luminous flux to an eyeglass lens, and a light-receiving optical system having a light-receiving element, receiving the measurement luminous flux passing through the eyeglass lens, an eyeglass holding device between the light-emitting and light-receiving systems, and an arithmetic control circuit computing characteristics of the lens based on receiving element output. The holding device includes a lens receiver supporting the lens, and an eyeglass sandwiching unit, which sandwiches the eyeglasses. The lens receiver is freely movable between the measurement optical path of the measurement optical system and a withdrawal position outside the path, and is moved in the withdrawal position after the eyeglasses have been sandwiched by the sandwiching unit.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: August 8, 2006
    Inventors: Yasufumi Fukuma, Takeyuki Kato, Eiichi Yanagi
  • Publication number: 20060001862
    Abstract: A lens meter according, including: a unit body provided with eyeglasses support means for supporting eyeglasses; a left measurement optical system provided in the unit body and provided with a left light-emitting optical system that emits measurement light to a left eyeglass lens of the eyeglasses and a left light-receiving optical system that receives the measurement light passing through the left eyeglass lens with a CCD (light-receiving element); a right measurement optical system provided in the unit body and provided with a right light-emitting optical system that emits measurement light to a right eyeglass lens of the eyeglasses and a right light-receiving optical system that receives the measurement light passing through the right eyeglass lens with the CCD (light-receiving element); and an arithmetic control circuit that performs operation to the optical characteristics of a pair of the eyeglass lenses based on an output of the CCD (light-receiving element).
    Type: Application
    Filed: September 1, 2005
    Publication date: January 5, 2006
    Inventors: Yasufumi Fukuma, Takeyuki Kato, Eiichi Yanagi
  • Patent number: 6950180
    Abstract: A lens meter according, including: a unit body provided with eyeglasses support means for supporting eyeglasses; a left measurement optical system provided in the unit body and provided with a left light-emitting optical system that emits measurement light to a left eyeglass lens of the eyeglasses and a left light-receiving optical system that receives the measurement light passing through the left eyeglass lens with a CCD (light-receiving element); a right measurement optical system provided in the unit body and provided with a right light-emitting optical system that emits measurement light to a right eyeglass lens of the eyeglasses and a right light-receiving optical system that receives the measurement light passing through the right eyeglass lens with the CCD (light-receiving element); and an arithmetic control circuit that performs operation to the optical characteristics of a pair of the eyeglass lenses based on an output of the CCD (light-receiving element).
    Type: Grant
    Filed: June 22, 2004
    Date of Patent: September 27, 2005
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Yasufumi Fukuma, Takeyuki Kato, Eiichi Yanagi
  • Patent number: 6943481
    Abstract: The present invention has been devised in order to raise driving efficiency of the vibration wave driving apparatus. A vibration member of a vibration wave driving apparatus of the present invention comprises the vibration member constituted of an elastic member and an electro-mechanical energy conversion element, and a rotor contacting the vibration member, and the vibration member generates a travelling wave in the elastic member when an alternating signal is applied to the electro-mechanical energy conversion element, in which an electrode film provided on a surface of the electro-mechanical energy conversion element of the vibration member is divided into a plurality of circular areas with different radiuses and each circular area is divided into a plurality of electrodes along its peripheral direction.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: September 13, 2005
    Assignees: Canon Precision Kabushiki Kaisha, Canon Kabushiki Kaisha
    Inventors: Takuji Okamoto, Eiichi Yanagi, Masaharu Suzuki, Yoshifumi Nishimoto, Hirokazu Hashidume, Osamu Yanase
  • Publication number: 20050162641
    Abstract: A lens-refracting characteristic measuring apparatus includes a measuring optical device to measure refracting characteristics of eyeglass lenses, an input device to input a pupillary distance of eyes of a person wearing eyeglasses, and an arithmetic and control circuit for obtaining refracting characteristics of the eyeglass lenses in positions of centers of right and left pupils of the person wearing the eyeglasses based on the pupillary distance of right and left eyes of the person wearing the eyeglasses input by the input device and the refracting characteristics measured by the measuring optical device.
    Type: Application
    Filed: January 26, 2005
    Publication date: July 28, 2005
    Applicant: Kabushiki Kaisha TOPCON
    Inventors: Eiichi Yanagi, Shinichi Nakamura
  • Publication number: 20050162642
    Abstract: A lens meter is adapted to measure optical characteristics of lenses of both an eye glass unit and an inspection glass unit, and includes a glass unit support, light sources, light-projecting optical systems, light detectors, light-detecting optical systems, and inspection glass frame adaptors for the inspection glass unit. The glass unit support includes two sandwiching members displaceable nearer or apart from each other and adapted to sandwich an outer peripheral portion of the eye glass unit, and the adaptors are adapted to be fitted to and detached from the two sandwiching members.
    Type: Application
    Filed: January 26, 2005
    Publication date: July 28, 2005
    Applicant: Kabushiki Kaisha TOPCON
    Inventors: Eiichi Yanagi, Shinichi Nakamura
  • Patent number: 6847441
    Abstract: Disclosed are a spectacle lens optical characteristics measuring method and a lens meter in which measurement beams are not intercepted by lens pressers. The left and right lenses of a pair of spectacles are point-supported by lens rest shafts at some midpoints in the optical paths of a pair of left and right measurement optical systems, and the spectacle frame for the lenses is held by a pair of frame retaining plates from the front and rear sides. In this state, the spectacle lenses are pressed against lens rest shafts by lens presser shafts to be thereby supported, whereby the way the spectacle frame is held by the frame retaining plates is corrected.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: January 25, 2005
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Shinichi Nakamura, Eiichi Yanagi
  • Publication number: 20050012896
    Abstract: An optometric apparatus 2 according to the present invention comprises a body portion 5r provided with an optical system for a right eye for projecting a chart for the right eye in order to inspect visual function of both eye of an examinee and a body portion 5l provided with an optical system for a left eye for projecting a chart for the left eye, the optical systems for the right and left eyes projecting the same fusion patterns to perform fusion of the both eyes of the examinee.
    Type: Application
    Filed: November 15, 2002
    Publication date: January 20, 2005
    Inventors: Yasufumi Fukuma, Kohji Nishio, Takefumi Hayashi, Eiichi Yanagi, Noriyuki Nagai, Yasuo Kato, Yukio Ikezawa, Mineki Hayafuji, Tadashi Okamoto, Masakazu Hayashi
  • Patent number: 6844925
    Abstract: A refracting power measuring apparatus according to the present invention comprises an optical system 1 for projecting a measuring light P toward a lens TL wet with liquid 12, a light receiving sensor 7 for receiving and outputting the measuring light P which passes through the lens TL, an arithmetic circuit 13 for calculating optical characteristic values based on a receiving signal, a residual quantity arithmetic circuit 14 for outputting a residual quantity signal based on characteristic value data of the arithmetic circuit 13, a delay circuit 19 for delaying the residual quantity signal, a comparing circuit 18 which compares a residual quantity signal delayed by the delaying circuit 19 and the following residual quantity signal and judges whether a difference therebetween is less than an allowed value.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: January 18, 2005
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Yasufumi Fukuma, Eiichi Yanagi
  • Publication number: 20050005722
    Abstract: A positioning device according to the present invention includes a movable body; a position detection unit detecting a position of the movable body; a first and a second vibratory actuator controlled in accordance with a detection output from the position detection unit; a first transmission mechanism comprising a first gear wheel and a first rack engaging the first gear wheel, the first transmission mechanism transmitting a driving force of the first vibratory actuator to the movable body; and a second transmission mechanism comprising a second gear wheel and a second rack engaging the second gear wheel, the second transmission mechanism transmitting a driving force of the second vibratory actuator to the movable body. An engaging position of the first gear wheel with the first rack is different from an engaging position of the second gear wheel with the second rack.
    Type: Application
    Filed: July 1, 2004
    Publication date: January 13, 2005
    Applicants: CANON KABUSHIKI KAISHA, CANON PRECISION INC.
    Inventors: Yoshifumi Nishimoto, Eiichi Yanagi, Akira Moriya
  • Publication number: 20040227933
    Abstract: A lens meter according, including: a unit body provided with eyeglasses support means for supporting eyeglasses; a left measurement optical system provided in the unit body and provided with a left light-emitting optical system that emits measurement light to a left eyeglass lens of the eyeglasses and a left light-receiving optical system that receives the measurement light passing through the left eyeglass lens with a CCD (light-receiving element); a right measurement optical system provided in the unit body and provided with a right light-emitting optical system that emits measurement light to a right eyeglass lens of the eyeglasses and a right light-receiving optical system that receives the measurement light passing through the right eyeglass lens with the CCD. (light-receiving element); and an arithmetic control circuit that performs operation to the optical characteristics of a pair of the eyeglass lenses based on an output of the CCD (light-receiving element).
    Type: Application
    Filed: June 22, 2004
    Publication date: November 18, 2004
    Inventors: Yasufumi Fukuma, Takeyuki Kato, Eiichi Yanagi