IMPROVED DIFFRACTION GRATING SCANNER WITH ANAMORPHIC CORRECTION OF SCAN CURVATURES

摘要

A scanner improves a diffraction grating, wherein image anamorphic formatting techniques are used to correct the curvature of the scanning in terms of scanning, and the field curvature so as to obtain an improved definition and a length increased scanning. Basically, the scanning system may include elements or refractive or reflecting components, comprising cylindrical lenses (13, 15, 36, 38) and reflectors (27, 33, 37, 39) of circular or elliptical cross sections and the lenses and reflectors (20) toroidal. These systems may further include a choice of one or more spherical Elements, but at least one cylindrical or toroidal element is to be expected. The imaged by anamorphosis correction device can be used with scanning devices has reflector comprising polygonal scanning devices and a simple mirror, and with type scanning devices has diffraction grating.