Non-contact temperature sensor and detection circuit for the same
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United States of America Patent
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Issued Date -
Jul 3, 2003
app pub date -
Dec 27, 2002
filing date -
Dec 27, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A non-contact temperature sensor includes a holder 10 having a cavity 12 with a light conducting portion 11 for conducting the infrared ray incident from an opening 10a at the one end and a closed-end cavity 13 with the one end closed which is arranged adjacently to the cavity 12; a resin film 20 arranged on the side of an opening 10b at the other end of the light conducting portion 11 of the holder 10 and an opening 10c of the closed end cavity 13; a space 50a formed behind the resin film 20; an infrared ray detecting heat-sensitive element 30a arranged on the resin film 20 located at the opening at the other end of the light conducting portion 11; a temperature compensating heat-sensitive element 30b arranged on the resin film 20 located at the opening 10c of the closed end cavity 13; and a cover member 50 for sealing the resin film 20 and forming the space 50a. In this configuration, the non-contact temperature sensor can accurately detect the infrared ray emitted from a detection object without being affected by a microwave.
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