| 摘要 |
A scan-range-changing mechanism of a scanner includes a scanning-scale ruler, a charge coupled device (CCD), a sliding seat which supports single-axis or two-axis moving capabilities, a plurality of lenses which are rigidly fixed on a sliding seat and located between the scanning-scale ruler and the CCD, and a plurality of scanning labels on the scanning-scale ruler for aligning and focusing the lenses with respect to the CCD.
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