OPTICAL SCANNER AND IMAGE FORMING APPARATUS USING THE SAME

摘要

PURPOSE: An optical scanner and an image forming apparatus using the same are provided to reduce a degree of a scanning line deflection by setting the optical scanner eccentrically to the sub-scanning direction. CONSTITUTION: An optical scanner includes an optical scanning unit to guide a plurality of light beams from a light source unit(1) to a deflection unit(5), and the plurality of light beams from the deflection unit to respective surfaces to be scanned with an optical scanning system. The optical scanning system has a single optical scanning element having an anamorphic plane. One surface of the single optical scanning element is an aspheric surface in the cross section in the main scanning direction.