| 摘要 |
In one embodiment, a scanner is provided having inter alia an optical zoom system, which includes a movable lens assembly and a rotatable mirror. The image to be scanned, the optical zoom system and the scanning head are located along an optical axis. The optical resolution of the image is variable by selectively displacing the lens assembly along the optical axis while simultaneously rotating the rotatable mirror about its center. In a further embodiment, a scanner is provided having inter alia a variable aperture for controlling the infiltration of stray light in a scanner having a plurality of optical resolutions.
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