Patents by Inventor Norimitsu Nagayama

Norimitsu Nagayama 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: 10261334
    Abstract: A lens holding frame includes: a frame portion, a plate-shaped portion, holding portions, and auxiliary holding portions. The frame portion has a tubular shape extending along a reference axis. The plate-shaped portion overhangs inward from an inner circumferential surface of the frame portion. The holding portions protrude at sites of at least three places, which are away from each other in a circumferential direction around the reference axis on a surface of the plate-shaped portion, in a direction along the reference axis and are located on an abutting plane. The auxiliary holding portions protrude from a surface of the plate-shaped portion up to heights at which the auxiliary holding portions do not reach the abutting plane in the same direction as the holding portions.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 16, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Norimitsu Nagayama
  • Publication number: 20170205637
    Abstract: A lens holding frame includes: a frame portion, a plate-shaped portion, holding portions, and auxiliary holding portions. The frame portion has a tubular shape extending along a reference axis. The plate-shaped portion overhangs inward from an inner circumferential surface of the frame portion. The holding portions protrude at sites of at least three places, which are away from each other in a circumferential direction around the reference axis on a surface of the plate-shaped portion, in a direction along the reference axis and are located on an abutting plane. The auxiliary holding portions protrude from a surface of the plate-shaped portion up to heights at which the auxiliary holding portions do not reach the abutting plane in the same direction as the holding portions.
    Type: Application
    Filed: March 31, 2017
    Publication date: July 20, 2017
    Applicant: OLYMPUS CORPORATION
    Inventor: Norimitsu NAGAYAMA
  • Patent number: 9612450
    Abstract: An method for producing an optical assembly includes a first assembling step of assembling lenses from a first lens to an (n?1)-th lens (where n is an integer of 1<n?N) to a lens-holding member to assemble a pre-assembly; an optical property-measuring step of measuring optical properties of a first optical system in the pre-assembly; an optical parameter correction value-calculating step of obtaining displacement amounts from design values of the optical properties of the first optical system based on measurement results of the optical properties, and changing the optical parameters of at least the n-th lens itself from design values thereof, thereby calculating correction values of the optical parameters of the n-th lens; a lens-producing step of producing the n-th lens based on the correction values; and a second assembling step of assembling the n-th lens produced in the lens-producing step to the pre-assembly.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: April 4, 2017
    Assignee: Olympus Corporation
    Inventors: Norimitsu Nagayama, Hiroyuki Seki
  • Publication number: 20160223829
    Abstract: A lens frame which is configured to dispose a lens on a reference axis and fix the lens, the lens frame includes an axial direction reception section configured to abut the lens in the axial direction and separated from the lens upon fixing of the lens in order to define an orientation of the lens with respect to the reference axis, an adhesive agent guide surface configured to form a gap, and an adhesive agent-blocking section formed between the adhesive agent guide surface and the axial direction reception section in the axial direction, fitted onto the side surface of the lens in the radial direction when the lens abuts the axial direction reception section, and configured to block the adhesive agent such that the adhesive agent introduced into the gap does not flow into the axial direction reception section.
    Type: Application
    Filed: April 12, 2016
    Publication date: August 4, 2016
    Applicant: OLYMPUS CORPORATION
    Inventor: Norimitsu NAGAYAMA
  • Publication number: 20150089789
    Abstract: An method for producing an optical assembly includes a first assembling step of assembling lenses from a first lens to an (n?1)-th lens (where n is an integer of 1<n?N) to a lens-holding member to assemble a pre-assembly; an optical property-measuring step of measuring optical properties of a first optical system in the pre-assembly; an optical parameter correction value-calculating step of obtaining displacement amounts from design values of the optical properties of the first optical system based on measurement results of the optical properties, and changing the optical parameters of at least the n-th lens itself from design values thereof, thereby calculating correction values of the optical parameters of the n-th lens; a lens-producing step of producing the n-th lens based on the correction values; and a second assembling step of assembling the n-th lens produced in the lens-producing step to the pre-assembly.
    Type: Application
    Filed: December 9, 2014
    Publication date: April 2, 2015
    Inventors: NORIMITSU NAGAYAMA, Hiroyuki Seki
  • Publication number: 20140247488
    Abstract: A first lens includes, on end surfaces of both ends in a direction along an optical axis, a first lens surface, a second lens surface, lens outer edges formed on outer peripheral sides of the first and second lens surfaces, and a lens side surface that is adjacent to the lens outer edges and serves as an outermost surface in a direction orthogonal to the optical axis. The first lens is provided so as to be mountable on a lens holding frame. In the first lens, a first abutment surface provided within one plane orthogonal to the optical axis is provided on at least one of the lens outer edges. A second projection is formed on at least one of the lens outer edges so as to protrude in the direction along the optical axis from a position closer to an inner peripheral side than the lens side surface, and the second projection has a reference cylindrical surface provided in a fixed positional relationship with the optical axis in the direction orthogonal to the optical axis.
    Type: Application
    Filed: May 15, 2014
    Publication date: September 4, 2014
    Applicant: Olympus Corporation
    Inventor: NORIMITSU NAGAYAMA
  • Patent number: 8652365
    Abstract: A mold set includes: a first mold and a second mold placed so that they sandwich an optical material and face each other; and a first spacer and a second spacer provided between the first and second molds, wherein: the first spacer secures an interval between the first and second molds at a first temperature achieved in a process of pressurizing the optical material; the first spacer shrinks in a mold opening-closing direction more greatly than the second spacer while the first temperature is changing to a second temperature achieved in a process of cooling the optical material; and the second spacer secures the interval between the first and second molds at the second temperature.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: February 18, 2014
    Assignee: Olympus Corporation
    Inventor: Norimitsu Nagayama
  • Publication number: 20120049395
    Abstract: A mold set includes: a first mold and a second mold placed so that they sandwich an optical material and face each other; and a first spacer and a second spacer provided between the first and second molds, wherein: the first spacer secures an interval between the first and second molds at a first temperature achieved in a process of pressurizing the optical material; the first spacer shrinks in a mold opening-closing direction more greatly than the second spacer while the first temperature is changing to a second temperature achieved in a process of cooling the optical material; and the second spacer secures the interval between the first and second molds at the second temperature.
    Type: Application
    Filed: August 26, 2011
    Publication date: March 1, 2012
    Applicant: Olympus Corporation
    Inventor: Norimitsu Nagayama