Patents by Inventor Kenichi Kusaka

Kenichi Kusaka 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: 10302925
    Abstract: To provide a microscope including: an objective optical system that condenses light from a sample; a relay optical system that relays the light condensed by the objective optical system; a photodetector detects the light coming from the objective optical system and relayed by the relay optical system; and a variable-focus optical system disposed at a position between the photodetector and the objective optical system, the position being optically conjugate to a pupil of the objective optical system, the variable-focus optical system being capable of changing a focal position of the objective optical system in a direction along an objective optical axis.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: May 28, 2019
    Assignee: OLYMPUS CORPORATION
    Inventors: Tatsuo Nakata, Kenichi Kusaka
  • Publication number: 20180136445
    Abstract: To provide a microscope including: an objective optical system that condenses light from a sample; a relay optical system that relays the light condensed by the objective optical system; a photodetector detects the light coming from the objective optical system and relayed by the relay optical system; and a variable-focus optical system disposed at a position between the photodetector and the objective optical system, the position being optically conjugate to a pupil of the objective optical system, the variable-focus optical system being capable of changing a focal position of the objective optical system in a direction along an objective optical axis.
    Type: Application
    Filed: October 25, 2017
    Publication date: May 17, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Tatsuo NAKATA, Kenichi KUSAKA
  • Patent number: 9851547
    Abstract: In a microscope having a plurality of optical units each including a filter block between an objective and a tube lens, the optical unit closest to the objective among the plurality of optical units includes a first filter block provided with an optical filter having a first effective diameter. The optical unit closest to the tube lens among the plurality of optical units includes a second filter block provided with an optical filter having a second effective diameter larger than the first effective diameter.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: December 26, 2017
    Assignee: OLYMPUS CORPORATION
    Inventors: Kenichi Kusaka, Atsushi Yonetani, Masayoshi Karasawa, Katsuyuki Abe
  • Publication number: 20170108683
    Abstract: A microscope includes: a light source, an objective, a varifocal optical system that is arranged on an illumination light path between the objective and the light source, a reflection optical system that deflects an illumination light axis of the illumination light toward an optical axis of the objective, and a rotator that rotates the objective and the reflection optical system around a rotation axis that is orthogonal to the optical axis of the objective.
    Type: Application
    Filed: October 13, 2016
    Publication date: April 20, 2017
    Applicant: OLYMPUS CORPORATION
    Inventors: Yuya MIYAZONO, Tatsuo NAKATA, Kenichi KUSAKA
  • Patent number: 9395529
    Abstract: A microscope includes a light source; a condenser lens irradiating a sample with a light from the light source; an objective facing the condenser lens across the sample; a first polarization plate placed between the light source and the condenser lens; a condenser turret placed between the first polarization plate and the condenser lens and having a plurality of optical elements placed inside; a polarization plate placed on the image side with respect to the objective; and a compensator placed between the first polarization plate and the polarization plate. In the microscope, according to the observation method, an optical element to be placed in an optical path among the plurality of optical elements placed inside the condenser turret is switched by rotation of the condenser turret.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: July 19, 2016
    Assignee: OLYMPUS CORPORATION
    Inventor: Kenichi Kusaka
  • Publication number: 20140295535
    Abstract: A measurement apparatus includes: a holding unit that holds at least a specimen to be observed; an illumination unit that emits illumination light to be irradiated to the specimen; a detection unit that is arrangeably provided in the holding unit and detects an intensity of the illumination light on a light irradiation surface of the specimen; a field stop that is formed with an aperture and stops down a field on the light irradiation surface by an image of the aperture that is provided on an optical path of the illumination unit, the aperture through which the illumination light passes and through which an image of the illumination light is projected on the light illumination surface; and a computation unit that computes, based on an area of the aperture and the detected intensity, an intensity of the illumination light per unit area of the light irradiation surface.
    Type: Application
    Filed: March 26, 2014
    Publication date: October 2, 2014
    Applicant: OLYMPUS CORPORATION
    Inventors: Akihiro KITAHARA, Madoka ITO, Hironori UTSUGI, Kenichi KUSAKA, Mina KOBAYASHI
  • Publication number: 20140291492
    Abstract: An irradiance measuring instrument for a microscope is intended to measure irradiance of light emitted from an objective of the microscope. The irradiance measuring instrument for a microscope includes, in an order where the light emitted from the objective proceeds, an optical system including a single lens that has a nearly flat surface oriented toward the side of the objective and also has positive power, and a photodetector configured to detect the light in order to measure the irradiance of the light on the nearly flat surface.
    Type: Application
    Filed: February 25, 2014
    Publication date: October 2, 2014
    Inventor: Kenichi KUSAKA
  • Publication number: 20140049815
    Abstract: A microscope includes a light source; a condenser lens irradiating a sample with a light from the light source; an objective facing the condenser lens across the sample; a first polarization plate placed between the light source and the condenser lens; a condenser turret placed between the first polarization plate and the condenser lens and having a plurality of optical elements placed inside; a polarization plate placed on the image side with respect to the objective; and a compensator placed between the first polarization plate and the polarization plate. In the microscope, according to the observation method, an optical element to be placed in an optical path among the plurality of optical elements placed inside the condenser turret is switched by rotation of the condenser turret.
    Type: Application
    Filed: October 25, 2013
    Publication date: February 20, 2014
    Inventor: Kenichi KUSAKA
  • Patent number: 8576482
    Abstract: An immersion microscope objective formed of thirteen or fewer lens elements includes, in order from the object side, first and second lens groups of positive refractive power, a third lens group, a fourth lens group having negative refractive power with its image-side surface being concave, and a fifth lens group having positive refractive power with its object-side surface being concave. The first lens group includes, in order from the object side, a lens component that consists of a lens element of positive refractive power (when computed as being in air) and a meniscus lens element having its concave surface on the object side. Various conditions are satisfied to ensure that images of fluorescence, obtained when the immersion microscope objective is used in a laser scanning microscope that employs multiphoton excitation to observe a specimen, are bright and of high resolution. Various laser scanning microscopes are also disclosed.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: November 5, 2013
    Assignee: Olympus Corporation
    Inventors: Masayoshi Saito, Eiji Yokoi, Kenichi Kusaka
  • Publication number: 20130242383
    Abstract: In a microscope having a plurality of optical units each including a filter block between an objective and a tube lens, the optical unit closest to the objective among the plurality of optical units includes a first filter block provided with an optical filter having a first effective diameter. The optical unit closest to the tube lens among the plurality of optical units includes a second filter block provided with an optical filter having a second effective diameter larger than the first effective diameter.
    Type: Application
    Filed: January 29, 2013
    Publication date: September 19, 2013
    Applicant: OLYMPUS CORPORATION
    Inventors: Kenichi KUSAKA, Atsushi YONETANI, Masayoshi KARASAWA, Katsuyuki ABE
  • Patent number: 8488248
    Abstract: An immersion microscope objective includes, in order from the object side, a first lens group having positive refractive power for converting the luminous flux from an object into convergent luminous flux, a second lens group having the refractive power lower than that of the first lens group, and a third lens group, and satisfies the following conditional expression where NA indicates the numerical aperture on the object side, and d0 indicates a working distance: 3 mm<NA×d0<8 mm.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: July 16, 2013
    Assignee: Olympus Corporation
    Inventors: Takashi Kasahara, Katsuyuki Abe, Kenichi Kusaka
  • Patent number: 8294984
    Abstract: A microscope includes a laser light source, an optical system which changes a beam diameter, and a field stop disposed at a position conjugating with a sample plane, in this order beginning from the side of the laser light source. In this microscopes the following conditional equation is satisfied: A?D/2 where “A” is the diameter of the field stop, and “D” is the diameter of light incident to the field stop.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: October 23, 2012
    Assignee: Olympus Corporation
    Inventors: Kenichi Kusaka, Yoshiharu Saito
  • Publication number: 20120113524
    Abstract: An immersion microscope objective includes, in order from the object side, a first lens group having positive refractive power for converting the luminous flux from an object into convergent luminous flux, a second lens group having the refractive power lower than that of the first lens group, and a third lens group, and satisfies the following conditional expression where NA indicates the numerical aperture on the object side, and d0 indicates a working distance.
    Type: Application
    Filed: November 4, 2011
    Publication date: May 10, 2012
    Applicant: OLYMPUS CORPORATION
    Inventors: Takashi KASAHARA, Katsuyuki Abe, Kenichi Kusaka
  • Publication number: 20110043906
    Abstract: An immersion microscope objective formed of thirteen or fewer lens elements includes, in order from the object side, first and second lens groups of positive refractive power, a third lens group, a fourth lens group having negative refractive power with its image-side surface being concave, and a fifth lens group having positive refractive power with its object-side surface being concave. The first lens group includes, in order from the object side, a lens component that consists of a lens element of positive refractive power (when computed as being in air) and a meniscus lens element having its concave surface on the object side. Various conditions are satisfied to ensure that images of fluorescence, obtained when the immersion microscope objective is used in a laser scanning microscope that employs multiphoton excitation to observe a specimen, are bright and of high resolution. Various laser scanning microscopes are also disclosed.
    Type: Application
    Filed: October 29, 2010
    Publication date: February 24, 2011
    Applicant: OLYMPUS CORPORATION
    Inventors: Masayoshi SAITO, Eiji YOKOI, Kenichi KUSAKA, Shuhei HORIGOME, Noriyuki SUGIZAKI
  • Patent number: 7869132
    Abstract: An immersion microscope objective formed of thirteen or fewer lens elements includes, in order from the object side, first and second lens groups of positive refractive power, a third lens group, a fourth lens group having negative refractive power with its image-side surface being concave, and a fifth lens group having positive refractive power with its object-side surface being concave. The first lens group includes, in order from the object side, a lens component that consists of a lens element of positive refractive power (when computed as being in air) and a meniscus lens element having its concave surface on the object side. Various conditions are satisfied to ensure that images of fluorescence, obtained when the immersion microscope objective is used in a laser scanning microscope that employs multiphoton excitation to observe a specimen, are bright and of high resolution. Various laser scanning microscopes are also disclosed.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: January 11, 2011
    Assignee: Olympus Corporation
    Inventors: Masayoshi Saito, Eiji Yokoi, Kenichi Kusaka
  • Patent number: 7764017
    Abstract: A plasma display panel comprises front plate (20) having display electrode (24) formed on a glass substrate with discharge gap (50), and back plate (30) having barrier ribs (34) formed to divide discharge cells, and arranged in a manner to confront the front plate (20). The barrier ribs (34) comprise vertical barrier rib (34a) arranged in parallel to an address electrode and horizontal barrier rib (34b) arranged in a manner to cross the vertical barrier rib (34a), and the vertical barrier rib (34a) has a shape satisfying the formula of H1>H2>H3, where H1 denotes a height of it at crossing portion (56) with the horizontal barrier rib (34b), H2 a height at a position of the discharge gap (50) of the display electrode (24), and H3 a height at a predetermined point between the position of the discharge gap (50) and the position of the crossing portion (56) with the horizontal barrier rib (34b).
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: July 27, 2010
    Assignee: Panasonic Corporation
    Inventors: Morio Fujitani, Keisuke Sumida, Shinichiro Ishino, Kenichi Kusaka
  • Publication number: 20100176721
    Abstract: A plasma display panel including rear glass substrate having address electrode, insulating layer, barrier rib and a phosphor layer thereon. Insulating layer does not contain lead. An average value of a void ratio of a region at a depth of up to 50% from rear glass substrate in a thickness of insulating layer ranges from 5% to 15%. A plasma display panel having a long lifetime and high productivity is achieved.
    Type: Application
    Filed: April 1, 2009
    Publication date: July 15, 2010
    Inventors: Ken Hasegawa, Keisuke Sumida, Morio Fujitani, Kenichi Kusaka, Hideyuki Shirahase, Kohshiroh Mizuno, Koji Aoto, Keiji Horikawa
  • Patent number: 7642525
    Abstract: An immersion type microscope objective is configured by, in order from the object side to an image side, a positive lens group Ga including a cemented lens obtained by cementing a plano-convex lens whose plane surface faces the object side to a meniscus lens whose concave surface faces the object side, and a positive single lens, a positive lens group Gb including a cemented lens, a lens group Gc including at least one cemented lens, a lens group Gd having a meniscus lens having a strongly concave surface that faces the image side, and a lens group Ge having a negative lens having a strongly concave surface that faces the object side.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: January 5, 2010
    Assignee: Olympus Corporation
    Inventors: Hirokazu Konishi, Yasushi Fujimoto, Kenichi Kusaka, Takashi Kasahara
  • Publication number: 20090296209
    Abstract: A microscope includes a laser light source, an optical system which changes a beam diameter, and a field stop disposed at a position conjugating with a sample plane, in this order beginning from the side of the laser light source. In this microscopes the following conditional equation is satisfied: A?D/2 where “A” is the diameter of the field stop, and “D” is the diameter of light incident to the field stop.
    Type: Application
    Filed: May 22, 2009
    Publication date: December 3, 2009
    Applicant: Olympus Corporation
    Inventors: Kenichi KUSAKA, Yoshiharu SAITO
  • Patent number: 7560709
    Abstract: Provided is a scanning laser microscope including a first laser light source for emitting ultrashort pulsed laser light; a scanning unit for two-dimensionally scanning the ultrashort pulsed laser light on a specimen; a second laser light source for emitting continuous laser light; an irradiation-position adjusting unit for performing two-dimensional adjustment of an irradiation position of the continuous laser light on the specimen; an objective lens for focusing the ultrashort pulsed laser light and the continuous laser light onto the specimen and for collecting fluorescence generated in the specimen; a light-detecting unit for detecting the fluorescence, which is split off from a light path between the objective lens and the scanning unit; and a continuous-laser-light switching unit for permitting radiation of the continuous laser light when the light-detecting unit is not detecting required fluorescence from the specimen on the basis of the ultrashort pulsed laser light.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: July 14, 2009
    Assignee: Olympus Corporation
    Inventors: Hiroyuki Kimura, Kenichi Kusaka, Katashi Ishihara