METHOD AND APPARATUS FOR KEEPING A DOCUMENT IN FOCUS DURING NONCONTACT SCANNING

METHOD AND APPARATUS FOR KEEPING A DOCUMENT IN FOCUS DURING NONCONTACT SCANNING

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 sen...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: LARKIN, ERIC, CHANG, ANA, RINALDIS, DAVID, SHAUGHNESSY, HELEN
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung: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.