| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lighting system capable of efficiently cutting infrared rays and ultraviolet rays by a small-area filter. <P>SOLUTION: In a light source lamp unit 20, a filter 28 reflecting ultraviolet rays and the like is arranged on a flat surface 23b of a concave lens 23. A concave surface 23a thereof is arranged on the side of a main reflecting mirror 22 relative to the flat surface 23b. The normal line H of the flat surface 23b is inclined by a minute angleαwith respect to the optical axis OA of a lamp device 20A. By virtue of such a structure, ultraviolet rays and the like can be efficiently cut by the small-area filter 28 without increasing the size of this lighting system. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
