Two-dimensional scanning optical system with distortion correction

摘要

A two-dimensional scanning optical system comprising a deflector capable of two-dimensional deflection of a light beam in two mutually orthogonal directions, an imaging lens system provided with a predetermined distortion characteristic and capable of focusing the light beam deflected by said deflector onto a plane to be scanned, and a light source for introducing said light beam into said deflector in a direction parallel to the optical axis of said imaging lens system, thereby achieving a scanning on said plane with substantially linear scan lines.