Patents Represented by Attorney, Agent or Law Firm Robon, Blecker & Daley
  • Quantity-of-light adjusting device and optical apparatus having the same
    Patent number: 6350068
    Abstract: A quantity-of-light adjusting device includes a drive source, a base member having an opening formed therein, and a blade arranged to move by being driven by the drive source and having three openings formed therein side by side in a row in a moving direction of the blade, wherein, among the three openings formed in the blade, the opening situated in the middle of the row is larger than the opening formed in the base member.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: February 26, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Tsuzuki, Toshiaki Kawanishi, Youichi Iwasaki, Hidetomo Tanaka