Patents Assigned to Asahi Kugaku Kogyo Kabushiki Kaisha
  • Patent number: 6351554
    Abstract: An optical member inspection apparatus includes an inspection optical system having a light source, and a diffusing means for diffusing the light emitted from the light source. The diffusing means has a central portion and a peripheral portion. The diffusion transmittance of the peripheral portion is higher than the diffusion transmittance of the central portion. The inspection optical system is also provided with an image pick-up means to pick-up an image of the optical member to be inspected, and is positioned so as to receive that light emitted from the light source and transmitted through the diffusing means and the optical member. A judging means is also provided, for judging whether or not the optical member has a defect, in accordance with image signals output from the image pick-up means.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: February 26, 2002
    Assignee: Asahi Kugaku Kogyo Kabushiki Kaisha
    Inventors: Toshihiro Nakayama, Masato Hara, Masayuki Sugiura, Atsushi Kida