Patent ID: 7944463
Filing Date: 2011-05-17
Classification: G03G,G06K,H04N

Abstract:
1. A light scanning apparatus comprising: a light source which emits a light beam; a deflector which has a deflection mirror oscillating about a drive axis approximately orthogonal to a main scanning direction, the deflection mirror reflecting the light beam emitted from the light source so as to scan the light beam reciprocally in the main scanning direction; and an imaging optical system which focuses the light beam deflected by the deflector on a surface to be scanned so as to form a beam spot on the surface, the surface being driven in a sub scanning direction approximately orthogonal to the main scanning direction and including an effective scan region spanning across a predetermined width in the main scanning direction, wherein a diameter of the beam spot in the sub scanning direction is equal to or larger than a maximum scanning pitch in the sub scanning direction within the effective scan region, and the scanning pitch in the sub scanning direction is not constant.