| 摘要 |
<p>A reflector plate having such a form that two lines start at one point on a circle enclosing an emission source having a cylindrical, spherical or similar shape and extend toward opposite sides to form two symmetrical involutes and a straight line connecting the opposite ends of the two curves are substantially circumscribed with the circle, whereby an emission from the emission source can be perfectly and uniformly emitted from an opening without being shielded at all, so that the efficiency is greatly improved and a uniform emission can be obtained. An assemblage of a light or heat emitting source with the involute reflector plate provided at the predetermined position makes it possible to give an illuminator or a heat radiator with a high efficiency of uniformly emitting the light or heat from the reflector opening.</p> |
