Radiometric temperature measurement by incoherent digital holography

This study aims to demonstrate radiometric temperature measurement using incoherent digital holography. Since in-focus images of thermal radiations can be reconstructed at any distance, three-dimensional radiometric temperature can be measured. This requires an optical configuration with a fixed magnification to record an incoherent hologram that contains information about the spectral radiance of an object. The derivation of spectral radiance from the intensity signal of a reconstructed image is described, in addition to calibration procedures correlating the holographic signal to radiation temperature. The experimental results and possible sources of uncertainty are discussed. (C) 2018 Optical Society of America