Optical Scanning Apparatus

摘要

An optical scanning apparatus includes first and second light sources configured to emit first and second light fluxes respectively, a deflector having a reflecting surface which reflects the first and second light fluxes, and configured to deflect the first and second light fluxes in a main scanning direction, and an imaging lens configured to let the first and second light fluxes through and form an image of the first and second light fluxes on the reflecting surface of the deflector. The imaging lens has a first incident surface into which the first light flux enters at a right angle, a second incident surface into which the second light flux enters at a right angle, a first outgoing surface from which the first light flux exits, and a second outgoing surface which makes an angle with the first outgoing surface and from which the second light flux exits.

主权项

1. 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; anda 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.