Studies on calibration of IR radiometer by radiometric method

摘要

IR radiometers are used for the measurement of IR intensity in military, industry, academic and research domains. For real-time, noncontact, accurate measurement with high sensitivity SR 5000 radiometer is employed. It covers the waveband from 0.4-14.5 μm and has a provision to accommodate many filters and detectors. The measurements are carried out with respect to internal black body, maintained at room temperature. As any measurement equipment requires repeatable, reproducible & accurate output, calibration at regular interval is a mandatory requirement. In the current paper the calibration of radiometer in radiometric mode using different filter bands at a distance of 80 and 3 meters is described. The calibration is done at different temperatures and Planck's function is calculated. The measured results are validated with the Planck's function. This paper also describes the convergence of results for 80 and 3 meters.