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Apparatus and method for temperature measurement by radiation

  • US 5,127,742 A
  • Filed: 04/19/1991
  • Issued: 07/07/1992
  • Est. Priority Date: 04/19/1991
  • Status: Expired due to Fees
First Claim
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1. An apparatus for measuring the temperature of an object by thermal radiation, said apparatus comprising:

  • a thermal radiation sensor for receiving radiation from said object;

    shutter means adapted for reversible interruption of said radiation from said object to said sensor,electrically operated means forming an integral part of a portion of said shutter means for maintaining said portion of said shutter means at a predetermined temperature for comprising a thermal reference portion for said sensor,means for alternatively exposing said thermal radiation sensor to radiation from said object and to radiation from said thermal reference portion of said shutter means,said thermal radiation sensor also being for providing a first signal representative of the radiation it receives from said object, and a second signal representative of the radiation it receives from said portion,electronic circuit means connected to said sensor for receiving said first signal and said second signal, for calculating the temperature of said object, and for providing a signal representative of said calculated temperature.

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