Analysis of the illuminance provided by LED modules placed at large distances from illuminated objects

Research paper by E. M. Guttsait

Indexed on: 08 Feb '09Published on: 08 Feb '09Published in: Journal of Communications Technology and Electronics


The possibility of applying LED modules for illumination of distant objects is analyzed. The illuminance distributions provided by large LED arrays with various optical systems are calculated. The influence of the number of LEDs, the intervals between LEDs, and the illumination angles on deviations from the law of inverse squared distance is studied. The conditions under which a variation in the LED elevation has only an insignificant effect on the illuminance and the radiation distribution over a limited illuminated area are determined.