Infrared radiometry using plastic hollow fibers

Plastic hollow fibers were used for non-contact temperature measurement. Using these fibers we performed temperature measurements between room temperature and 120°C. The output signal of the infrared detector, amplified by a lock-in-amplifier, was measured compared to the controlled thermal source temperature. Several inner diameters (ID) of the hollow fibers were employed to investigate the energy transmission. Spatial resolution was approximately equal to the fiber inner diameter.