| 摘要 |
PROBLEM TO BE SOLVED: To achieve thinning without causing high cost while providing an oscillating mirror device as a light deflector.SOLUTION: An optical scanning apparatus includes a light source unit having four light sources arranged so that emission axes exist in the same plane parallel with the XY plane, a reflecting mirror 2430 for folding the optical path of a plurality of light fluxes from the light source unit, an oscillating mirror unit that has a deflection reflecting surface 2411A and deflects the plurality of light fluxes via the reflecting mirror 2430 by oscillating the deflection reflecting surface 2411A about the axis parallel to the X-axis direction, and a separation mirror 2440 that is arranged on the optical path of the plurality of light fluxes deflected by the oscillating mirror unit, reflects part of the light fluxes on the +X side, and reflects the remaining light fluxes on the -X side. |
