| 摘要 |
A lighting fitting for an electric luminous source having a molded part of transparent material surrounding the luminous source. The molded part is open on the top and at the bottom and has a first lower system of outer prisms and a second upper system of two outer prisms, all of them located in planes normal to the symmetry axis of the luminous source. A top part offers the luminous source a concave reflecting surface. The assembly is arranged so that a part of the luminous rays emerge directly through the lower opening of the molded part, another part is refracted by the first system of prisms, another part undergoes a total reflection in the second system of prisms, emerging out of the first prism of this second system in a diver form and of the second prism in a convergent form without hitting the lower located prisms, and part of the light rays is reflected downwards and outwards by the upper reflecting surface. The molded part may comprise another system of inner prisms disposed in planes which pass through the symmetry axis and direct the light rays in an asymmetric form relative to the ground's plane. |
