| 摘要 |
A light guide unit (20) includes, a first light guide (21) having a column shape that takes a light incident upon one end surface and emits a light from other end surface and from a light emitter on a side surface of the first light guide (21), and a second light guide (22) having a column shape that takes the light emitted from the other end surface of the first light guide (21) then incident upon one end surface of the second light guide (22), and emits the light from a light emitter on a side surface of the second light guide (22), and the one end surface of the second light guide (22) are located close proximity to the other end surface of the first light guide (21). The first light guide (21) includes a first mating member (28A), and the second light guide (22) includes a second mating member (28B) engaging with a first alignment member such that the side surface of the first light guide (21) having the light emitter and the side surface of the second light guide (22) having the light emitter are flush with each other, and the other end surface of the first light guide (21) is located close proximity to the one end surface of the second light guide (22). |
