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Applied Optics

Applied Optics


  • Vol. 37, Iss. 13 — May. 1, 1998
  • pp: 2708–2715

Design and analysis of electrically calibrated tympanic thermometers

Mang Ou-Yang, Jin-Shown Shie, and Chyi Tsao  »View Author Affiliations

Applied Optics, Vol. 37, Issue 13, pp. 2708-2715 (1998)

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A new tympanic thermometer is analyzed and tested experimentally. An electrically calibrated pyroelectric detector of special configuration is employed to determine a person’s body temperature. An energy-storage, power-supply-isolated capacitor is used as the electrical heating reference. The new thermometer design has an accuracy within ±0.1 °C with a 90% confidence and is immune to ambient temperature, detector aging, and parameter variations. An equivalent-circuit model is established in the analysis to account for the heat exchanges among the tympanum, the surroundings, and the detector as well as for the electrothermal behavior of the detector. The model provides effective simulation of the thermometer with PSPICE. Critical parameters governing the accuracy and the limitation of the tympanic thermometer are also pointed out by the simulation.

© 1998 Optical Society of America

OCIS Codes
(040.3060) Detectors : Infrared
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(120.6780) Instrumentation, measurement, and metrology : Temperature
(170.3890) Medical optics and biotechnology : Medical optics instrumentation

Original Manuscript: October 10, 1997
Revised Manuscript: December 1, 1997
Published: May 1, 1998

Mang Ou-Yang, Jin-Shown Shie, and Chyi Tsao, "Design and analysis of electrically calibrated tympanic thermometers," Appl. Opt. 37, 2708-2715 (1998)

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