Patent ID: 6642951
Filing Date: 2003-11-04
Classification: B41J,G02B,H04N

Abstract:
An optical scanning device comprising:a deflector for deflecting in batch a plurality of laser beams entered as being arrayed in a vertical direction to the plane of deflection; a converting optical unit for converting equiangular speed motion of the plurality of laser beams deflected by the deflector in batch into uniform speed linear motion; a plurality of reflection mirrors for reflecting the plurality of laser beams converted by said converting optical unit; a plurality of focusing optical units for focusing the plural laser beams reflected by said plurality of reflection mirrors; and a plurality of photoreceptors for forming an electrostatic latent image by the plurality of laser beams focused by said plurality of focusing optical units, each of said plurality of photoreceptors being arranged in a sub scanning direction to each of the plurality of laser beams from said plurality of focusing optical units, wherein interval of the plurality of laser beams deflected from said deflector is an uneven pitch, and interval ratio corresponds to layout distance ratio of said plurality of reflection mirrors.