| 摘要 |
<p>PURPOSE: To efficiently irradiate a surface to be irradiated with light from a light source by providing a focal distance decided based on the diameter of the surface to be irradiated on a main reflection mirror. CONSTITUTION: The light radiated from the light source 10 is reflected by a palaboloid mirror 11, and becomes parallel light rays to irradiate the surface 100 to be irradiated. On the other hand, the light source 10 is arranged on a central position of a spherical mirror 16. The light irradiated from the light source 10 is reflected from the spherical mirror 16 to be reflected to the light source 10 again. The light reflected by the spherical mirror 16 passes through the light source 10, or passes through the vicinity of the light source, and is reflected by the palaboloid mirror 11 to become the parallel light rays and to irradiate the surface 100 to be irradiated. The opening end of the palaboloid mirror 11 passes through the light source 10 and exists until the surface 200 perpendicular to a light axis. In such a case, the palaboloid mirror 11 whose focal distance F is nearly 1/4 of the diameter a of the surface to be irradiated is used as the main reflection mirror, and the light source 10 is arranged on nearly the focal position of the palaboloid mirror 11, and the spherical mirror 16 of a ring shape whose central position becomes nearly the light source 10 position is used as an auxiliary reflection mirror.</p> |
