| 摘要 |
An optical scanning device includes a light source for emitting first light beams, a deflecting unit that deflects the first light beams as second light beams having scanning lines that are substantially arc shaped, a scanning lens disposed in a light path of one of the second light beams, and a light-blocking member interposed between the deflecting unit and the scanning lens. The light-blocking member blocks reflected light generated from the one of the second light beams when the second light beam enters the scanning lens. The light-blocking member protrudes toward the second light beam path along at least a scanning area of the second light beam, and includes a protruding edge section curving in substantially a same arc shape as the scanning line.
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