| 摘要 |
An optical scanning device (32) includes: a light projector (65) configured to radiate light while causing the light to make angular movement at a constant speed; and a light reflector (66) configured to reflect the light radiated from the light projector (65) to guide the light to an intended irradiated point on a predetermined scanning line (52). The light reflector (66) includes a plurality of reflecting portions (71, 72) and reflects, at least twice, the light radiated from the light projector (56) to guide the light to the intended irradiated point. The reflecting portions (71, 72) each include a plurality of reflecting surfaces (77, 78). A length of an optical path from the light projector (65) to the irradiated point is substantially constant for all of irradiated points on the scanning line (52), and a scanning speed, on the scanning line (52), of the light radiated from the light projector (65) is substantially constant. |
