| 摘要 |
PROBLEM TO BE SOLVED: To provide a light guide body having smaller light-quantity loss.SOLUTION: An entrance surface 11a of a light entrance part 11 of a light guide body 10 has refraction faces 11c, 11d formed around an intersection point P2 between a straight line a passing through a light center LC of a light source LS and a branch point P1 between light guide parts 12, 13 and the entrance surface 11a. The refraction faces 11c, 11d refract light entering from the light source LS to lead it to the light guide parts 12, 13.SELECTED DRAWING: Figure 3 |
