Optical scanning apparatus

An optical scanning apparatus comprising:

• a first light source configured to emit first light flux;
• a second light source configured to emit second light flux;
• a deflector having a reflecting surface which reflects the first light flux and the second light flux, and configured to deflect the first light flux and the second light flux in a main scanning direction;
• and
• an imaging lens configured to let the first light flux and the second light flux through and form an image of the first light flux and the second light flux on the reflecting surface of the deflector,
• wherein the imaging lens has:
• a first incident surface into which the first light flux enters at a right angle when viewed from a sub scanning direction which is orthogonal to the main scanning direction;
• a second incident surface which is arranged side-by-side in the main scanning direction with respect to the first incident surface and into which the second light flux enters at a right angle when viewed from the sub scanning direction;
• a first outgoing surface from which the first light flux exits;
• and
• a second outgoing surface which is arranged side-by-side in the main scanning direction with respect to the first outgoing surface, which makes an angle with the first outgoing surface when viewed from the sub scanning direction, and from which the second light flux exits.