Patents Represented by Law Firm Kane, Dalsimer, Sullivan, Kurucz, Levy, Eisele and Rihard
  • Optical system for eliminating ghost image in wide wavelength band
    Patent number: 5193028
    Abstract: A ghost image eliminating optical system in a transmission optical system including a plurality of transmission optical elements having boundary reflection surfaces, so that a ghost image can be formed by light reflected by at least two specific boundary reflection surfaces, wherein the specific boundary reflection surfaces are coated with at least two anti-reflection coatings having complementary reflection characteristics to eliminate the ghost image.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: March 9, 1993
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventor: Masato Noguchi