| 摘要 |
<p>A plural-beam scanning optical apparatus comprises light source means having a plurality of light emitting portions, a first optical system for converting a plurality of divergent light beams from the light source means into parallel light beams, a light deflector for deflecting the plurality of light beams from the first optical system, a stop disposed between the first optical system and the light deflector, and a second optical system for condensing the plurality of light beams deflected by the light deflector on a scanned surface. The plurality of light emitting portions are arranged in a direction oblique with respect to the main scanning direction of the light beams on the scanned surface. The apparatus satisfies the following condition: d DIVIDED 2.(n-1).L DIVIDED f < 0.2, where n is the number of the plurality of light emitting portions, d is the pitch thereof, L is the distance from a reference position on the deflecting surface of the light deflector to the stop, and f is the focal length of the first optical system. <IMAGE></p> |
