Light scanning apparatus

Alight scanning apparatus comprising:

• a deflecting unit configured to deflect a first light flux from a first light source to scan a first scanned surface in a main scanning direction;
• a first imaging optical system including at least one optical element configured to guide the first light flux deflected by a first deflecting surface of the deflecting unit to the first scanned surface;
• and
• a first reflecting element configured to reflect the first light flux,
• wherein, on an optical path of the first light flux from the deflecting unit to the first scanned surface, the first reflecting element is arranged between the deflecting unit and a first optical element closest to the deflecting unit among the at least one optical element included in the first imaging optical system, and
• wherein a first optical path length between a first on-axis deflection point of the first deflecting surface and the first scanned surface on an optical axis of the first imaging optical system is equal to or less than a first distance between outermost off-axis image heights on the first scanned surface.