Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1997-12-16
1999-11-23
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
358474, 358494, H04N 104
Patent
active
059904704
ABSTRACT:
An apparatus for optically scanning a document to generate digital image data corresponding to local optical densities of the document including a fixed glass plate, one side of which defines an original image plane, a transporting mechanism for transporting the document in a sub-scanning direction in the original image plane, at least two linear sensors situated in a main scanning direction, each having an array of opto-electric converters and each provided with a lens which images on the sensor a linear observation area, situated in the original plane, wherein the observation areas of the sensors are substantially in line and partially overlapping at the ends in the main scanning direction. An aligning element is situated between the lenses and the original image plane at a short distance from the latter in a position such that its perpendicular projection onto the original image plane is situated within the overlapping ends of two adjoining observation areas, wherein the aligning element has a shape such that for each sensor in whose observation area it is situated the aligning element has a width in the main scanning direction which monotonically increases or decreases as a function of the sub-scanning direction.
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Luu Thanh X.
Octe,acu etee-Technologies B.V.
Westin Edward P.
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