Patent ID: 8233209
Filing Date: 2012-07-31
Classification: B41J,G02B,H04N

Abstract:
1. An optical scanning device that scans a scanning surface with light beams, the optical scanning device comprising: a light source that includes a plurality of vertical-cavity surface light-emitting lasers (VCSEL) that emits light beams in only one direction; a deflector that includes a deflection-reflection surface for deflecting the light beams from the light source; a first optical system that is arranged on an optical path of the light beams between the light source and the deflector, and guides the light beams from the light source to the deflector, the first optical system including a plate having an opening that defines a diameter of the light beams in at least a sub-scanning direction; a second optical system that guides the light beams deflected by the deflector to the scanning surface; and a monitoring optical system that monitors an amount of light flux emitted from the plurality of surface light-emitting lasers, the amount of light flux monitored being used to correct a driving current of the plurality of vertical-cavity surface light-emitting lasers, wherein light beams directed from the deflector to the second optical system are inclined from a normal line of the deflection-reflection surface of the deflector with respect to a sub-scanning direction.