G - Physics – 01 – J
Patent
G - Physics
01
J
326/16, 73/52
G01J 5/18 (2006.01) G01J 5/06 (2006.01) G01J 5/34 (2006.01) G01K 3/10 (2006.01) G01K 13/00 (2006.01) G01J 5/00 (2006.01) G01J 5/08 (2006.01)
Patent
CA 1265355
Abstract of the Disclosure An electronic infrared thermometer is disclosed comprising a housing forming an interior chamber, a pyroelectric sensor mounted within the chamber for sensing temperature change and generating an indicative electrical signal, means for directing infrared radiation from the object to be measured to the pyroelectric sensor, a shutter assembly for controlling the passing of infrared radiation to the pyroelectric sensor, an ambient temperature sensor for sensing ambient temperature within the interior chamber and generating an electrical signal indicative thereof, an electrical circuit for processing the electrical signals to calculate the temperature of the object to be measured, and an indicator for indicating the calculated temperature. The process for measuring the temperature of an object is also disclosed comprising shielding the pyroelectric sensor from infrared radiation from exterior to the thermometer housing, selectively exposing the pyroelectric sensor to infrared radiation substantially solely from the object to be measured to generate a first electrical signal related to the absolute temperature of the object to be measured, sensing the ambient temperature of the pyroelectric sensor and generating a second electrical signal proportional thereto, and electrically processing the first and second electrical signals to calculate the temperature of the object to be measured.
506939
Bull Housser & Tupper Llp
Fraden Jacob
Thermoscan Inc.
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