AMBIENT TEMPERATURE CORRECTING METHOD OF FIBER TYPE RADIATION THERMOMETER

摘要

PURPOSE:To obtain ambient temperature information and correct temperature information on a fiber at a measurement side by arranging a long-wavelength transmission fiber whose object-side terminal is closed optically in parallel to a fiber for object measurement, and placing a temperature detector at the opposite side. CONSTITUTION:Infrared rays emitted by an object 1 of measurement are passed through the long-wavelength transmission fiber 3 for object measurement and added to infrared light emitted by the fiber itself to reach the temperature detector 6. The long-wavelength transmission fiber 5 provided for ambient temperature correction is closed optically at a part 2 and supplies only the infrared light emitted by the fiber itself to a temperature detector 7. The temperature information obtained by those two temperature detectors is supplied to a data processing part 8 for comparative arithmetic and displayed on a display device 9 as temperature. An ambient temperature part which exerts influence upon temperature measurement is shown by 4. Consequently, the cryogenic measurement range of the fiber type infrared radiation thermometer is expanded.