Abstract
In the case of discussing the properties of light sources and luminares, it is important to know the total luminous flux and the light distribution curve. We have studied on the automatic measurement of light distribution curve and total luminous flux for several years, and now, it is possible to measure within from a few minutes to scores seconds. In this paper, the authors described the general of the automatic light distribution measuring equipment and showed the integral method of luminous flux. In addition, we discussed the error of photometric system and made clear that the measurement by light distribution method is better than globe photometer.
