Patents Assigned to Tomey Corp.
  • Patent number: 5408311
    Abstract: A method and apparatus for measuring a refracting power of an optical system to be inspected. A beam source generates a luminous flux which passes through the optical system to be inspected. A rotating plate intermittently blocks the beam after passing through the optical system to be inspected. A beam receiving element receives the beam passing through the optical system to be inspected and intermittently blocked by the rotating plate, and outputs a beam reception signal based on the received beam. A rotational position detector detects a rotational position of the rotating plate and outputs a rotational plate detection signal based on the detected rotational position of the rotating plate. Further, a calculating means calculates the refracting power of the optical system to be inspected based on a change quantity from the detected rotational plate detection signal to the detected beam reception signal.
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: April 18, 1995
    Assignee: Tomey Corp.
    Inventors: Toshiyuki Suzuki, Yoshinobu Ogawa, Kazuhito Miyajima
  • Patent number: 5359372
    Abstract: A contact lens for intraocular observation capable of optically recognizing an inner portion of an eyeball by contacting the contact lens on a surface of a cornea of an eye to be inspected through a light ray transmitted through an inner portion of the contact lens comprising: an optical path dividing member provided on an optical path for leading a light ray incident on the inner portion of the contact lens to the eye to be inspected for dividing a portion of the light ray on said optical path; and an index provided at a position approximately optically conjugate with a portion to be observed of the eye to be inspected on a divided optical path divided by the optical path dividing member. The portion to be observed and said index can optically be recognized by at least partially superposing a first image of the index on a second image of the portion to be observed.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: October 25, 1994
    Assignee: Tomey Corp.
    Inventors: Hideki Kida, Shinji Ishiguro, Toshiharu Morino
  • Patent number: 5148231
    Abstract: An apparatus for measuring a refracting power of an optical system which comprises: a beam projecting optical system which projects a predetermined moving luminous flux to an optical system to be inspected; a beam condensing optical system in which a photoelectric conversion element receives a luminous flux transmitted through the optical system to be inspected; and a processing system which obtains the refracting power of the optical system to be inspected, based on an output from the beam condensing optical system; wherein a rotating plate having at least one tooth of a converging shape, which is protruded outwardly from a center of the rotating plate, is disposed in a beam path of the beam projecting system; and a luminous flux, both edges, in a moving direction thereof, of which are inclined to the moving direction with angles being different with each other and correspond to both sides of the tooth, irradiates the optical system to be inspected, by intermittently blocking the beam path by the tooth.
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: September 15, 1992
    Assignee: Tomey Corp.
    Inventors: Shinji Ishiguro, Toshiharu Morino