| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical scanner capable of effectively cutting flare light without making the noise due to a polygon mirror and jitters in the main scanning direction deteriorate, and forming a high-quality image with simple parts, such as a plastic lens, and to provide a color image forming apparatus that uses the scanner. SOLUTION: In the optical scanner, a plurality of beams radiated from a plurality of light sources are deflected by the different deflecting surfaces of the same deflector having a plurality of deflecting surfaces and is guided to corresponding surfaces to be scanned through respective scanning lens systems provided for every beam. In the scanner, a light-shielding member is provided at least at one of non-effective regions put between the optical path of an incident beam on the deflecting surface and the optical path of a scanning beam, reflected and deflected by the deflecting surface and made incident on the surface to be scanned; and the flare light reflected by the lens surface of either scanning lens system is prevented from being made incident on the other scanning lens system. COPYRIGHT: (C)2009,JPO&INPIT
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