Patent ID: 6919978
Filing Date: 2005-07-19
Classification: B41J,G02B,G03G

Abstract:
1. An optical scanning device comprising: an aperture stop for limiting a light flux width of a plurality of light fluxes in a sub-scanning direction; an optical deflector for deflecting the light fluxes passing through the aperture stop; a scanning optical system for guiding the plurality of light fluxes deflected by the optical deflector onto a surface to be scanned; and synchronous position detecting means for detecting the plurality of light fluxes deflected by the optical deflector to obtain a synchronous signal, which includes a synchronous detection sensor, wherein: the synchronous position detecting means further includes an imaging element and a slit for synchronous position detection, the slit being provided between the imaging element and the synchronous detection sensor; and a conjugate point of a slit surface of the slit is set between a deflection surface of the optical deflector and the aperture stop within a sub-scanning section by the imaging element.