Radiometry. thermometry, and minimum resolvable temperature with IR fiber optics

Infrared fiber radiometry for remote monitoring of surface temperature is demonstrated with fluoride glass, sapphire single crystal, silver halide polycrystalline and chalcogenide glass fibers. Analytical and experimental characteristics for various radiometer designs are described. Temperature measurement capability from subambient at 253 degrees Kelvin to 823 degrees Kelvin has been demonstrated along with minimum resolvable temperature difference of 0.1 degrees.