Patents by Inventor Taeko Toshi

Taeko Toshi 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).

  • Microscope objective lens
    Patent number: 10281703
    Abstract: Provided is a microscope objective lens that sufficiently corrects on-axis and off-axis chromatic aberrations and that has a long working distance. A microscope objective lens OL includes, in order from an object side, a first lens group G1 with positive refractive power and a second lens group G2 with negative refractive power. The first lens group G1 of the microscope objective lens OL includes a diffractive optical element GD including a diffractive optical surface D, and the diffractive optical element GD is arranged at a position closer to the image than a section where a diameter of a light flux passing through the first lens group G1 is the largest.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: May 7, 2019
    Assignee: NIKON CORPORATION
    Inventors: Taeko Toshi, Kazuhiro Takasago
  • MICROSCOPE OBJECTIVE LENS
    Publication number: 20180081158
    Abstract: Provided is a microscope objective lens that sufficiently corrects on-axis and off-axis chromatic aberrations and that has a long working distance. A microscope objective lens OL includes, in order from an object side, a first lens group G1 with positive refractive power and a second lens group G2 with negative refractive power. The first lens group G1 of the microscope objective lens OL includes a diffractive optical element GD including a diffractive optical surface D, and the diffractive optical element GD is arranged at a position closer to the image than a section where a diameter of a light flux passing through the first lens group G1 is the largest.
    Type: Application
    Filed: November 13, 2017
    Publication date: March 22, 2018
    Applicant: NIKON CORPORATION
    Inventors: Taeko TOSHI, Kazuhiro TAKASAGO
  • Microscope objective lens
    Patent number: 9851546
    Abstract: Provided is a microscope objective lens that sufficiently corrects on-axis and off-axis chromatic aberrations and that has a long working distance. A microscope objective lens OL includes, in order from an object side, a first lens group G1 with positive refractive power and a second lens group G2 with negative refractive power. The first lens group G1 of the microscope objective lens OL includes a diffractive optical element GD including a diffractive optical surface D, and the diffractive optical element GD is arranged at a position closer to the image than a section where a diameter of a light flux passing through the first lens group G1 is the largest.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: December 26, 2017
    Assignee: NIKON CORPORATION
    Inventors: Taeko Toshi, Kazuhiro Takasago
  • MICROSCOPE OBJECTIVE LENS
    Publication number: 20160238828
    Abstract: Provided is a microscope objective lens that sufficiently corrects on-axis and off-axis chromatic aberrations and that has a long working distance. A microscope objective lens OL includes, in order from an object side, a first lens group G1 with positive refractive power and a second lens group G2 with negative refractive power. The first lens group G1 of the microscope objective lens OL includes a diffractive optical element GD including a diffractive optical surface D, and the diffractive optical element GD is arranged at a position closer to the image than a section where a diameter of a light flux passing through the first lens group G1 is the largest.
    Type: Application
    Filed: April 26, 2016
    Publication date: August 18, 2016
    Applicant: NIKON CORPORATION
    Inventors: Taeko TOSHI, Kazuhiro TAKASAGO
  • Microscope objective lens
    Patent number: 9366850
    Abstract: Provided is a microscope objective lens that sufficiently corrects on-axis and off-axis chromatic aberrations and that has a long working distance. A microscope objective lens OL includes, in order from an object side, a first lens group G1 with positive refractive power and a second lens group G2 with negative refractive power. The first lens group G1 of the microscope objective lens OL includes a diffractive optical element GD including a diffractive optical surface D, and the diffractive optical element GD is arranged at a position closer to the image than a section where a diameter of a light flux passing through the first lens group G1 is the largest.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: June 14, 2016
    Assignee: NIKON CORPORATION
    Inventors: Taeko Toshi, Kazuhiro Takasago