Bongsoo LEE^*, Wook Jae YOO, Dong Hyun CHO, Kyoung Won JANG, Soon-Cheol CHUNG, and Gye-Rae TACK

School of Biomedical Engineering, College of Biomedical and Health Science, Research Institute of Biomedical Engineering, Konkuk University, Chungju 380-701, Korea

(Received January 25, 2007; Accepted June 19, 2007)

In this study, we measured an infrared radiation which is transferred by a silver halide optical fiber from a heat source using a radiometer system for low-temperature measurements. To increase the amount of infrared radiation through the silver halide optical fiber and to the pyroelectric sensor, infrared optical devices used were an infrared focusing lens and a collimator. The relationship between the temperatures of a heat source and the measured radiometer signals were determined. The measurable temperature range of a fiber-optic temperature sensor using a pyroelectric sensor was from 298 to 333 K. It is expected that a noncontact low-temperature sensor using an infrared optical fiber can be developed for medical and industrial usages based on the results of this study.

Key words: fiber optic sensor, infrared radiation, noncontact temperature sensor, pyroelectric sensor, silver halide optical fiber

^*E-mail address: bslee@kku.ac.kr