| 摘要 |
PURPOSE: A laser scanning unit is provided to reduce the number of lenses arranged on optical axes and simplify an arrangement structure by variously changing optical paths of laser beams from a light source unit to a photoconductive drum, thereby reducing manufacturing cost and manufacturing processes. CONSTITUTION: A light source unit(110) generates a plurality of laser beams. First and second horizontal polarizers(131,132) are arranged on optical axes of partial laser beams. First and second vertical polarizers(133,134) are arranged on optical axes of the rest of the laser beams. A polygonal mirror(105) deflects first and second polarized lights generated while passing the first and second polarizers. Optical filters(151,152) pass the first polarized lights while reflecting the second polarized lights at a predetermined angle.
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