| 摘要 |
The invention provides a scanner system that in one embodiment is of the flatbed type and employs first and second cameras that have first and second areas of view respectively of each scan line, such areas being proximate to one another in a common boundary region of each scan line. The cameras are designed so that in forming first and second images respectively of their corresponding areas of view, the center of each image is displaced from the camera's central axis in such a direction that the angle formed at the document between equivalent optical paths from a point in the common boundary region to each of the images is substantially less than the angle resulting in the absence of such displacement. This design permits relatively good alignment of the two camera images in a desktop scanner notwithstanding some variation in height of the document above the platen. Other embodiments provide improvements in lid design, and isolation from vibration and torsional forces. |
