| 摘要 |
According to one embodiment, a lighting device includes: a light source (22) configured to generate light used for reading of an image; and a light guide (21) configured to extend in a predetermined direction and lead light, which is irradiated from the light source, to an image reading region, the light guide having, at an end in the predetermined direction, an incident region (R2) where the light irradiated from the light source is made incident and a cutting trace (R1).
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