Patent ID: 8339696
Filing Date: 2012-12-25
Classification: G02B

Abstract:
1. An optical scanning device comprising: a light source that includes a plurality of light emitting units for emitting light beams; a deflector that includes a deflecting surface for deflecting the light beams from the light source; a scanning optical system that focuses the light beams deflected by the deflector on a surface to be scanned; and a monitoring optical system that monitors a quantity of light beams emitted from the light source, wherein the light emitting units are arranged two-dimensionally, and a distance between two light emitting units at opposite ends in a main scanning direction is smaller than a distance between two light emitting units at opposite ends in a sub-scanning direction, the size of the deflecting surface in the main scanning direction is smaller than a width of a light flux of light beams in the main scanning direction, and upon scanning around a center of a writing area with light beams, intensities of the light beams increase from a light beam at a center in the main scanning direction toward at least one of a light beam at a write-start position and a light beam at a write-end position.