| 摘要 |
An optical scanning apparatus, including: light sources; a deflector configured to deflect beams emitted from the light sources; and imaging optical systems configured to focus the beams deflected by a deflecting surface of the deflector on surfaces to be scanned, respectively, wherein: the beams entering the deflecting surface are P-polarized beam; the optical scanning apparatus further includes at least one reflection optical element reflecting a beam in a sub-scanning cross section on each of optical paths from the deflecting surface to the surfaces to be scanned; the optical paths include first and second optical paths having different numbers of the reflection optical elements from each other; and the optical scanning apparatus further includes an adjustor configured to adjust an output of a light source corresponding to at least one of the first and the second optical paths from among the light sources so that predetermined conditions are satisfied.
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