| 摘要 |
PROBLEM TO BE SOLVED: To obtain an optical scanner and an image forming apparatus using the same with which field curvature, distortion (DIST), etc., in a subscanning cross section are properly compensated, and with which superior optical performance can be obtained. SOLUTION: The optical scanner includes a surface-emitting laser light source, having a plurality of light-emitting sections, a first optical system containing a condensing element that converts a plurality of luminous fluxes from the laser light source to luminous fluxes in other states, a deflection means for reflecting/deflecting the luminous fluxes from the first optical system, and a second optical system for guiding the luminous fluxes deflected by the deflection means to a surface to be scanned. The optical scanner is characterized in that the plurality of light-emitting sections of the laser light source is arranged, at least with spaces separated in the subscanning direction, that the shape of the optical face of at least one image forming optical element comprising the second optical system is non-circular arcuate in the subscanning cross section, and that a conditional expression is satisfied. COPYRIGHT: (C)2007,JPO&INPIT |
