| 摘要 |
<p>The scanner (300) has a lighting device emitting a luminous flux with multiple spectral bands for lighting a sheet (204). A detection module (360) has a charge coupled device sensor (164) with rows (166-170) of sensitive elements each delivering an electrical energy proportional to intensity of the flux. A focusing device (150) focuses, on each row, a part of the flux reflected by the sheet. The module has a non-prismatic spectral shifting device (305), in the form of optical plate, to shift each of the focused parts parallel to the rows, where shifting is different for each row.</p> |
