Patent ID: 6337757
Filing Date: 2002-01-08
Classification: B41J,G02B,H04N

Abstract:
An optical exposure unit comprising:light sources which are arranged in correspondence with numbers indicated by N1 to NM (M is an integer not less than 2) and emit light beams; first lens means for converting the light beams emitted by each of said light sources into one of convergent light and collimated light, said first lens means including one of a finite lens and collimate lens in number corresponding to a sum of N1 to NM; second lens means given lens power associated with a first direction to converge the light beams output from each of said first lens means in only the first direction, M sets of said second lens means being provided; deflection means for deflecting the light beams output from said second lens means in a second direction perpendicular to the first direction, said deflection means including a reflection surface which is formed to be rotatable about a rotation axis extending in a direction parallel to the first direction as a center of rotation; and imaging means, including at least one lens, for imaging each of the light beams deflected at an equal speed by said deflection means at a predetermined position, and wherein an incident angle of each of the light beams output from the first lens means to the second lens means has a predetermined tilt, and a position of the beam is decentered from an optical axis of each of the second lens means.