Patent ID: 6686948
Filing Date: 2004-02-03
Classification: G02B,G03F

Abstract:
A laser imaging apparatus, comprising:a laser source that emits a laser beam; a relaying optical system including a plurality of lens elements, said relaying optical systems relaying the laser beam emitted by said laser source; a deflector having at least one deflecting surface that deflects the laser beam relayed by said relaying optical system; an imaging optical system that converges said laser beam deflected by said at least one deflecting surface to form a beam spot on a surface to be scanned, an optical axis of said relaying optical system and an optical axis of said imaging optical system intersecting at a deflection reference point which is located in the vicinity of said at least one deflecting surface; a first adjusting system that compensates for an inclination error of the laser beam incident on said at least one deflecting surface, said first adjusting system being provided in said relaying optical system; and a second adjusting system that compensates for a positional error of the laser beam incident on said at least one deflecting surface, said second adjusting system being provided in said relaying optical system, wherein said relaying optical system includes a modulator that ON/OFF modulates the laser beam passing therethrough, and wherein said first and second adjusting systems are located on a front side of said modulator.