Combined dust protection and dark calibration slide for a flat-b

Details Combined dust protection and dark calibration slide for a flat-b Combined dust protection and dark calibration slide for a flat-b

1995-06-29

1998-12-01

Vu, Kim Yen

Facsimile and static presentation processing

Facsimile

Picture signal generator

358474, 358475, H04N 104

Patent

active

058446974

ABSTRACT:
A scanning apparatus providing separate fixed object focal planes for transmissive and reflective original documents to be scanned, wherein a scan carriage containing illumination, sensor, and optical elements is moved together to scan an original document and to obtain a digitized representation thereof. The movable scan carriage has an illumination source disposed between the reflective and transmissive object focal planes, with the object focal plane to be used selected by changing the position of one or more optical elements within the scan carriage. A dark slide provides protection against flare during scanning, and can be closed to provide for dark current calibration as well as to seal the system from dust when not in use.

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