Patents Assigned to Petori Kogyo Kabushiki Kaisha
  • Binocular including a preassembled focusing unit
    Patent number: 5305141
    Abstract: A binocular comprising a binocular body, one or a pair of objective lens-barrel unit or units, a pair of eyepiece lens-barrels and a pair of image-erecting chambers. A pair of parallel optical axes pass through the objective lens-barrel unit or units. The image-erecting chambers are arranged between the objective lens-barrel unit or units and the eyepiece lens-barrels. The image-erecting chambers have incorporated therein their respective prism units for optically connecting the optical axes of the objective lens-barrel unit or units to respective optical axes of the eyepiece lens-barrel units. Each of the image-erecting chambers is associated with the binocular body for angular movement relative thereto about a corresponding one of the optical axes of the objective lens-barrel unit or units in such a manner that the optical axes of the respective eyepiece lens-barrel units are movable angularly toward and away from each other respectively about the optical axes of the objective lens-barrel unit or units.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: April 19, 1994
    Assignees: Asahi Kogaku Kogyo Kabushiki Kaisha, Petori Kogyo Kabushiki Kaisha
    Inventor: Keiichi Hotta
  • Binocular with objective lens-barrels rotatable about the optical axes of the objectives
    Patent number: 5196959
    Abstract: A binocular comprising a binocular body, one or a pair of objective lens-barrel unit or units, a pair of eyepiece lens-barrels and a pair of image-erecting chambers. A pair of parallel optical axes pass through the objective lens-barrel unit or units. The image-erecting chambers are arranged between the objective lens-barrel unit or units and the eyepiece lens-barrels. The image-erecting chambers have incorporated therein their respective prism units for optically connecting the optical axes of the objective lens-barrel unit or units to respective optical axes of the eyepiece lens-barrel units. Each of the image-erecting chambers is associated with the binocular body for angular movement relative thereto about a corresponding one of the optical axes of the objective lens-barrel unit or units in such a manner that the optical axes of the respective eyepiece lens-barrel units are movable angularly toward and away from each other respectively about the optical axes of the objective lens-barrel unit or units.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: March 23, 1993
    Assignees: Asahi Kogaku Kogyo Kabushiki Kaisha, Petori Kogyo Kabushiki Kaisha
    Inventors: Akira Yanagisawa, Keiichi Hotta