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Infra-red radiation detector devices

  • US 4,697,081 A
  • Filed: 01/30/1986
  • Issued: 09/29/1987
  • Est. Priority Date: 02/08/1985
  • Status: Expired due to Term
First Claim
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1. An infrared radiation detector device comprising:

  • a first dual detector having first and second pyroelectric detector elements spaced from each other, each pyroelectric detector element producing an individual output signal and comprising a pyroelectric material having opposite surfaces with electrodes on the opposite surfaces, the first and second pyroelectric detector elements being electrically connected to each other to produce a detector output signal which is the difference between the individual output signals; and

    a second dual detector having third and fourth pyroelectric detector elements spaced from each other, each pyroelectric detector element producing an individual output signal and comprising a pyroelectric material having opposite surfaces with electrodes on the opposite surfaces, the third and fourth pyroelectric detector elements being electrically connected to each other to produce a detector output signal which is the difference between the individual output signals;

    characterized in that the first pyroelectric detector element of the first dual detector is interdigitated with the third pyroelectric detector element of the second dual detector.

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