G - Physics – 01 – K
Patent
G - Physics
01
K
73/123, 340/154,
G01K 7/00 (2006.01)
Patent
CA 1038646
ABSTRACT A temperature sensor and method for producing a remanent electrostatic image of a thermal gradient existing on the surface of an object are disclosed. The sensor includes a layer of poled, pyroelectric material that is employed as a medium on which the thermal gradient image is electrostatically formed, with such pyroelectric layer coated on one side with a thermally and electrically conductive layer. The sensor is positioned for a time with its conductive layer in surface-to-surface contact with the object to permit the temperature of the pyroelectric layer to conform to the thermal gradient of the surface of the object contacted by the sensor. Subsequently, both planar surfaces of the pyroelectric layer are electrically naturalized and the sensor is then removed from the object. As the pyroelectric layer returns to the ambient temperature, an electrostatic image representative of the thermal gradient of the object is formed on the uncoated surface of the pyroelectric layer.
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