A SERIES OF ROUND ROBIN TEST TO IMPROVE AGREEMENT OF CIE AVERAGED LED INTENSITY MEASUREMENTS AMONG KOREAN INDUSTRIAL LABORATORIES

摘要

A series of round robin test in CIE averaged LED intensity was performed among Korean industrial laboratories under coordination of the national metrology laboratory. While all participants reported that the measurement reproducibility is better than 1.0 %, they mostly show disagreement with the coordinator by more than 5 % except a participant. Worst of all, two of them show the disagreement by even more than 15 %. However, the discrepancies between the participants are expected to be resolved in case of an aid of standard LEDs since the good reproducibility indicates that their deviations are quite systematic.