| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting system capable of reducing brightness without reducing illuminance. <P>SOLUTION: A light guide body 12 leading light L from an LED 9 to a predetermined direction, includes a reflection surface 17 for reflecting the light L from the LED 9 to the predetermined direction, and an emission surface 18 for emitting the light L reflected at the reflection surface 17. The reflection surface 17 is formed of a plurality of small reflection surfaces 19 divided into an upper and a lower parts, and step parts 20 are formed by shifting small reflection surfaces 19 in an optical axis A direction so that the small reflection surfaces 19 are the further away from the LED 9, the lower small reflection surfaces 19 are placed. Since the small reflection surfaces 19 are placed intermittently, the lights L reflected at small reflection surfaces 19, respectively, pass through the emission surface 18 with an interval corresponding to each step part 20, thus a passing area of the light L on the emission surface 18 is enlarged, and since a total amount of the light L does not change, brightness is reduced without reducing illuminance of the light L, so that an irradiated object in a working area can be made easily seen. <P>COPYRIGHT: (C)2012,JPO&INPIT |
