Method and apparatus for keeping a document in focus during noncontact scanning
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United States of America Patent
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Jan 23, 2001
Grant Date -
N/A
app pub date -
Jul 16, 1998
filing date -
Jul 16, 1998
priority date (Note) -
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Abstract
This invention relates to a scanning device for scanning a document such as a photograph using an image sensor device that uses optics that may have a narrow depth of focus, the scanning avoiding contact of the document by the image sensor device during scanning. That is, the focal volume of the sensor device is at a distance from the image sensor device. The scanning device includes a positioning mechanism that maintains the front surface of the document in the focal volume during scanning.
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