| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical scanner, wherein large size and cost increase are suppressed, and uneven light quantity on a face to be scanned is reduced, and to provide an image forming apparatus using the optical scanner. SOLUTION: The optical scanner includes: light sources which are so arranged to be turned around an axis in the emitting directions of emitting light beams so that adjacent light-emitting points have a distance in a main-scanning direction and in a subscanning direction; an optical deflector 4 which scanningly deflects the light beam which is made incident from the light source to the deflecting and reflecting surface in a state where the light beam includes more P-polarization components than S-polarization components; a scanning optical system which images the light beam deflected with the optical deflector 4 onto a photoreceptor 7; and folding mirrors M1, M2 which guide the light beam to the photoreceptor 7, wherein the folding mirrors M1, M2 are disposed closer to the photoreceptor 7 than a scanning lens L composing a scanning system and having positive refractive power in the main-scanning direction, and the light sources are so arranged to be turned in the direction that the reflectance of the folding mirror M2, which has the largest deflection angle among the folding mirrors, increases at the side opposite to the light sources across the optical axis of the scanning lens. COPYRIGHT: (C)2010,JPO&INPIT |
