A fiber-optic radiometer is developed for accurate noncontact temperature measurements. Of compact and novel design, it is based on replacing the usual chopper with a simple shutter. The radiometer operates in a spectral range of 5–20 μm and uses a silver-halide IR-transmitting optical fiber. The radiometer has a temperature resolution of 0.1 °C, a time response of 200 ms, and a spatial resolution of ~1 mm. Theory, simulation, radiometer design and construction, and examples of experimental measurements are shown. The novel radiometer can be used in diverse applications in science, medicine, and industry.
© 2002 Optical Society of America
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(120.6780) Instrumentation, measurement, and metrology : Temperature
Sharon Sade, Ophir Eyal, Vered Scharf, and Abraham Katzir, "Fiber-Optic Infrared Radiometer for Accurate Temperature Measurements," Appl. Opt. 41, 1908-1914 (2002)