Simple Methods for the Calibration of Light Measuring Equipment

Simple methods are described for absolute calibration of thermal radiation detectors (thermopiles, bolometers); absolute calibration at various wavelengths of photoelectric devices; obtaining the relative spectral sensitivity of the detector systems of spectrofluorimeters. The procedures require no special standard lamp or other exotic equipment. The methods depend on the computation of the radiation characteristics of an ordinary tungsten lamp at various measured voltages and currents.