| 摘要 |
An oriented circular light-reflecting plate with triangular micro prisms having identical cross sections and a circular plate lamp made therefrom, wherein a plurality of annular micro prism bodies (111) are arranged on the prism surface (11) of the light-reflecting plate (1), the cross sections through the central axis are triangles, which have the same shapes, the same cross sectional areas and the same distances along the diameter direction, the apex of the triangle closest to the central axial line has the shortest distance away from the smooth surface (12) of the light-reflecting plate, and the apices of the triangles towards the periphery of the light-reflecting plate have the successively increasing distances away from the smooth surface 912) of the light-reflecting plate. The circular plate lamp comprises the light-reflecting plate (1), a heat-dissipating frame (3), a reflecting back plate (5), a heat-dissipating plate (4) and lamp bodies (2), wherein the heat-dissipating frame (3) is sleeved around the light-reflecting plate 91) so as to form a gap with the cylindrical surface of the light-reflecting plate 91) and consequently constitute a lamp groove (14) to receive the lamp bodies (2). |
