Patent ID: 9395537
Filing Date: 2016-07-19
CPC Classification: B41J,G02B,G03G,H04N

Claim Text:
1. An optical scanning apparatus, comprising: a deflection unit that deflects a plurality of light fluxes to optically scan a plurality of scanned surfaces in a main scanning direction; a plurality of incident optical systems that cause the plurality of light fluxes to enter the deflection unit at different incident angles in a sub-scanning cross section; and an imaging optical system that guides the plurality of light fluxes deflected by the deflection unit onto the plurality of scanned surfaces, wherein the imaging optical system has a first optical portion and a second optical portion connected to each other by a connecting portion in a sub-scanning direction, wherein in a first plane including the connecting portion, a first incident surface of the first optical portion and a second incident surface of the second optical portion overlap with each other on a first point, wherein in the first plane, in a first region on one side of the first point in the main scanning direction, the first incident surface is located closer to the deflection unit than the second incident surface in an optical axis direction, and wherein in the first plane, in a second region on another side of the first point in the main scanning direction, the second incident surface is located closer to the deflection unit than the first incident surface in the optical axis direction.