HIGH RESOLUTION DEVICE FOR DIGITIZING LARGE SIZE DOCUMENTS

摘要

The document (12) is set on a planar support (14) defining an object plane. The device comprises an analysing chamber (16) located at some distance from the document, with a lens forming an image of the document on an image plane. The chamber comprises a photosensitive sensor analysing a line of the image plane along a first direction, and first driving means for moving in controlled manner the sensor along a second direction, distinct from the first, so as to scan the image plane surface along said second direction. A light generator (20) is further provided for forming on the object plane a narrow light bar (36) directed parallel to said first direction, and comprising second driving means for moving in controlled manner the light bar so as to scan the object plane surface parallel to said second direction. Automatic control means control mutually the first and second driving means to ensure homothety between the scanning line and the light bar on the object plane.