Abstract
Transient characteristics of Toshiba tungsten ribbon strip lamps widely used for calibration of optical pyrometers were studied both for the initial transient (from the unlighted state to any state ready for pyrometer calibration) and for the intermediate transient (between two lighted states).
Measurements were carried out for four vacuum lamps and four fas-filled lamps under the condition of the constant current input and with the aid of a precise comparator of spectral radiances using photoelectric detection.
The results were so orderly arranged by means of the regression equation that the waiting time necessary for guaranteeing establishment of the steady state within the allowable limit can be evaluated easily and accurately for any luminance temperatures at which pyrometers are to be calibrated.
