| 摘要 |
A light-collective member ( 142 ) for collecting a light outputted from a light source ( 140 ), which irradiates a light toward a document surface, toward a sub-scanning direction is provided in front of the light source ( 140 ). An illuminating portion which is so formed that each of opposite end surfaces ( 170, 172 ) in the main scanning direction of the light-collective member ( 142 ) has an obtuse angle with respect to a bottom surface ( 174 ) facing the light source ( 140 ).
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