Film scanner and scanning method for suppressing of brightness fluctuations of a radiation source

摘要

The scanner digitizes a film (2) with a stabilized radiation source (4) and produces light (5), so that cutouts of the film are illuminatable. A film platform is provided the film and illustration optics (6) with a photo-sensitive sensor (7) digitizes the illuminated cutouts of the film. The illustration optics on the photo-sensitive sensor is imagable, into digital graphic data. A photo-sensitive reference sensor measures brightness fluctuations of the radiation source and determines brightness measured values. A correction unit (18) corrects the digital graphic data in accordance with the certain brightness measured values. The photo-sensitive reference sensor (10) is a part of the photo-sensitive sensor (7). The radiation source, the illustration optics and the reference sensor are so arranged, that a part (11) of the light of the radiation source (4) is imagable with the aid of the illustration optics on the reference sensor (10), without that the part (11) of the light the film (2) is analyzed. The photo-sensitive sensor and or the reference sensor are assigned a thermal stabilization unit (16). An independent claim is included for a scanning method.