Contributed Review: Absolute spectral radiance calibration of fiber-optic shock-temperature pyrometers using a coiled-coil irradiance standard lamp.

摘要: We describe an accurate and precise calibration procedure for multichannel optical pyrometers such as the 6-channel, 3-ns temporal resolution instrument used in Caltech experimental geophysics laboratory. begin with a review of sources shock temperatures 3000-30 000 K range. High-power, coiled tungsten halogen standards spectral irradiance appear to be only practical alternative NIST-traceable ribbon lamps, which are no longer available large enough calibrated area. However, non-uniform radiance complicates use lamps reliable reproducible that employ imaging or relay optics. Careful analysis documented methods pyrometer standard shows one technique, not directly applicable our case, is free major radiometric errors. provide detailed description modified its absolute calibration, ±5%. designated central area 0.7× demagnified image coiled-coil lamp filament, cross-calibrated against lamp. give results cross-calibration along descriptions arrangement, data acquisition, processing. characterize difference between static dynamic response amplified photodetectors, allowing time-dependent photodiode correction factors histories from experiments. validate correct operation actual temperature experiments on single-crystal NaCl MgO obtain very good agreement literature these substances. conclude summary most essential requirements error-free fiber-optic shock-temperature using high-power