Geometric configurations for photosites for reducing moire patterns
AssigneeXerox Corporation
InventorsAlain E. Perregaux, Jagdish C. Tandon, Roger L. Triplett, Xiao-Fan Feng
Life of this patent
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Abstract
Geometric configurations for photosites found on photosensitive chips for creating electrical signals from an original image, as would be found, for example, in a digital scanner, copier, printer, facsimile machine, or other document generating or reproducing device. The photosensitive chips are mounted on a substrate to form a photosensitive array in a full width scanner or other photosensitive device. The geometric configurations reduce the Moiré patterns to provide a higher quality image.
Claims16
A photosensitive array having fast and slow scan directions, the photosensitive array comprising:
- a chip;
- an array of generally rectangular photocollection areas on the chip, each of the photocollection areas including first, second, third and fourth complementary shapes, wherein:
- the first and second complementary shapes of one photocollection area and the first and second complementary shapes of another photocollection area form one photosite;
- and
- each complementary shape has a photodetection device, each complementary shape has the same surface area and the photosites are collinear.
A photosensitive array having fast and slow scan directions, the photosensitive array comprising:
- a chip;
- an array of generally rectangular photocollection areas on the chip, each of the photocollection areas including first, second, third and fourth elliptical shapes, wherein:
- the first and second elliptical shapes of one photocollection area and the first and second elliptical shapes of another photocollection area form one photosite;
- and
- each elliptical shape has a photodetection device, each elliptical shape has the same surface area and the photosites are collinear.
A digital copier comprising:
- a raster input scanner scanning documents to generate digital image signals, the raster input scanner including a plurality of generally rectangular chips, which are assembled end to end on a substrate forming an array of generally rectangular buttable photocollection areas, each of the photocollection areas consisting of first, second, third and fourth complementary shapes, wherein the first and second complementary shapes of one photocollection area and the first and second complementary shapes of another photocollection area form one photosite, each complementary shape has a photodetection device, each complementary shape has the same surface area, and the photosites are collinear;
- and
- a controller directing a raster output scanner to expose a photoconductive belt to create an electrostatic latent image based on image signals received from the raster input scanner.
Dependencies are inferred from the claim text.