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US 5,315,414 AGranted
System for controlling multiple filters in a color raster input scanner
AssigneeXerox Corporation
InventorsThomas R. Beikirch, Richard A. Beck, Jack K. Fullerton, Joseph P. Taillie
Life of this patent
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Abstract
In a color scanner wherein a plurality of filters are selectably disposed in a light path to a sensor array, a target area of a preselected test color is provided adjacent the platen for the image to be scanned. The target area is used to determine which of the plurality of filters is disposed along the light path at a given time.
Claims7
In an apparatus for scanning a color document, an image scanner converts a light image of the color document into a series of scan lines, wherein the improvement comprises:
- a target of a preselected color;
- a plurality of different color optical filters;
- and
- means for indexing a selected one of said optical filters from a not-filtering position to a filtering position, said selected one of said optical filters filtering the light image of the color document and a light image of the target, and the image scanner responding to the optically filtered light image of the target to confirm that said selected one of the optical filters is in the filtering position.
1 more element
Dependencies are inferred from the claim text.