Patent ID: 6842187
Filing Date: 2005-01-11
Classification: G02B,G06K

Abstract:
1. An optical beam scanning device comprising: a plurality of light sources; a pre-deflection optical unit for providing predetermined characteristics for light beams from the plurality of light sources; one light-deflection unit for deflecting, in a predetermined direction, the plurality of light beams provided with the predetermined characteristics by the pre-deflection optical unit; a post-deflection optical unit for causing the plurality of light beams deflection-scanned with the light-deflection unit to image on scanned surfaces, so that a plurality of latent images are formed; and an only one horizontal synchronization unit for which the plurality of light sources passed through at least a part of the post-deflection optical unit are provided; wherein said pre-deflection optical unit, said light-deflection unit and said post-deflection optical unit operate so that one of the latent images to be formed is formed by the plurality light beams while the other latent images are respectively formed by one light beam; said light-deflection unit deflects the light beams which form the plurality of latent images by one surface or an integrally processed surface thereof; said horizontal synchronization unit which is on a position of an upstream side of scanning lines forming a latent image formed by the plurality of light beams and is positioned to detect that a light beam forming the latent image formed by the plurality of light beams reaches a predetermined position; and at a time of forming the latent image, writing timing for all of the latent images is determined based on a signal from said only horizontal synchronization unit.