| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED unit in which an edge can obtain a sharp irradiation area even if a spot light source is used in a light source.SOLUTION: In an LED unit 10, a plurality of recessed face reflection faces 14, 14A to 14D having a plurality of reflection faces 17, 18, 19A to 19C are continuously arranged, LEDs 16 are arranged while opposing the recessed face reflection faces 14, 14A to 14D, a plurality of the recessed face reflection faces 14, 14A to 14D form one irradiation area 20 by the overlap of irradiation areas 20A to 20D, and the reflection faces 18 at both end parts of the continuously-arranged recessed face reflection faces 14, 14A to 14D are made to be shadowless reflection faces 18 for making optical lines of the LEDs 16 orient a center part O of the one irradiation area 20. A shield member is arranged at a boundary between and among the reflection faces 17, 18, 19A to 19C of the recessed face reflection faces 14, 14A to 14D being a portion which is reflected toward an edge of the one irradiation area 20 in optical design, and the portion is made non-reflective. |
