Patent ID: 7903133

Claim:
An imaging apparatus comprising: N (≧2) photoconductive photosensitive bodies arranged along a path for conveying a sheet-like recording medium; and N optical scanners optically scanning said N photosensitive bodies, respectively, so as to write and form different electrostatic latent images thereon, the electrostatic latent images being made visible as toner images of different colors so that the toner images are transferred to and fixed on the sheet-like recording medium, being superimposed one over another, wherein: one of said N photosensitive bodies has a black toner image formed thereon; and each of the optical scanners for the remaining N−1 photosensitive bodies comprises: a light source modulated based on image data; an optical deflection and scanning part deflecting a light beam emitted from said light source; and a scanning and imaging optical system condensing the deflected light beam toward a scanning surface of the corresponding photosensitive body so as to form a light spot on the scanning surface, the light spot optically scanning the scanning surface, an effective scanning region of the scanning surface being divided into a plurality of regions according to a scanning line curving characteristic; and suitable image data for optically scanning the divided regions being selected from image data of a plurality of image lines every time the light spot optically scans the effective scanning region, so that the image data of each of the image lines is written with scanning line curving being corrected based on the black toner image.