| 摘要 |
The focused light incident from the light source on the document to be scanned has two different lengths of light path. The shorter light path is incident on the document near the light source. The longer light path is incident on the document away from the light source with a larger light spot and scans the document at a higher speed to yield a lower resolution. The high resolution light ray reflected from the document and the low resolution light ray reflected from the document pass through a set of transmitting lenses tilted at different angles to irradiate two different sets of charge coupled device sensors.
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