Symmetrical reflector lighting system - has reflector rotation symmetrical to optical axis with light source located on axis

摘要

The lighting system has a reflector rotation symmetrical to an optical axis and a light source located on that optical axis and a light source located on that optical axis. The light source (1) has a ball symmetrical light intensity distribution of the radiated light, which is shaded within the area of a double cone the cone axis of which corresponds with the optical axis and which has an opening angle of 200. The reflector is of such a shape that a light ray which leaves the light source below an azimuth angle O in relation to the optical axis hits the illuminated surface vertical to the optical axis which is positioned at a given distance from the reflector, at a distance r from the point of penetration of the optical axis by the illuminated surface, with the following formula applying:- r2 ca. cos THETA 0 -- cos THETA.