Patent ID: 6989855
Filing Date: 2006-01-24
Classification: G02B

Abstract:
1. A multi-beam light scanning optical system having an optical deflector and, a light beam incident optical system for causing a condenser lens to condense each of light beams emitted from a plurality of light sources and making the light beams incident on a deflecting surface of said optical deflector, wherein in said light beam incident optical system, a relay optical system is inserted between the plurality of light sources and the condenser lens, wherein an image forming point of each of said plurality of light sources through said relay optical system in the main scanning plane is located between said optical deflector and said relay optical system, wherein an aperture stop for limiting a beam width of each of the light beams emitted from the plurality of light sources is arranged on a light source side with respect to said image forming point, and wherein letting f is satisfied.