| 摘要 |
PROBLEM TO BE SOLVED: To provide a uniformly luminous intensity distribution characteristic, even on a complex surface in order to increase the range of applications. SOLUTION: A first plate 51 and a third plate 53 made of a thermosetting resin, a second plate 52 and diffusion layers 54 and 55 are provided. The second plate 52 is bonded directly to the first plate 51, and the third plate 53 to be integral and made from a thermoplastic resin. The diffusion layers 54 and 55 are formed at the integrating of the second plate 52 with both plates. The diffusion layers 54 and 55 has an island construction, and the size of a resin to be an island is the order of 0.1-50 μm. Light which entered the resin to be the island is attenuated there without reflecting again directly, due to the complex shape of the island. More specifically, the intensity of light which enter the diffusion layers 54 and 55 is made uniform. |
