Patents Assigned to Kureha Kaqaka Koqyo Kabushiki Kaisha
  • Pyroelectric infrared temperature compensated detector
    Patent number: 4792682
    Abstract: A pyroelectric infrared detector or infrared ray receiving element comprising a plurality of pyroelectric operating areas, utilizing one of the operating areas as an infrared radiation detection area having a light-transmissive surface electrode. The electrical signal produced in the signal detection area is compensated by an electrical signal produced in another pyroelectric operating area having a light-reflective surface electrode. Temperature drift and noise due to vibration are drastically reduced through the compensation.
    Type: Grant
    Filed: July 21, 1986
    Date of Patent: December 20, 1988
    Assignee: Kureha Kaqaka Koqyo Kabushiki Kaisha
    Inventors: Yasushi Endou, Hisao Takahashi, Tetsuaki Kon