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US 6,333,498 B1Granted
Reduction of integrating cavity effect in scanners using polarizing filters
AssigneeXerox Corporation
InventorStuart A. Schweid
Life of this patent
Estimating the term…
Abstract
The integrating cavity effect is reduced by using a polarizing filter. The polarizing filter reduces the secondary illumination onto a document being scanned. The filter is placed at the opening to the cavity of the scanner. The sum effects of using a polarizing filter reduces the integrating cavity effect by a factor of 2.
Claims22
An image capture device that generates electronic image data from an original image, comprising:
- a transparent platen, the original image placeable on the transparent platen;
- a light source;
- an imaging device;
- a reflector, distinct from the light source, illuminated by the light source, light reflected by the reflector illuminating the transparent platen;
- and
- a polarizer, placed between the transparent platen and the reflector relative to an opening to a cavity of the image capture device, the polarizer independently reducing the amount of light reflected and transmitted to the imaging device.
3 more elements
An image capture device that generates an electronic image data from an original image, comprising:
- a transparent platen, the original image placeable on the transparent platen;
- a light source;
- an imaging device;
- a member placed between the light source and the transparent platen, the member having an opening through which light from the light source passes to illuminate the original image and through which the light reflected from the original image passes to illuminate the imaging device;
- and
- a polarizer, placed over the opening in the member, the polarizer independently reducing the amount of light reflected and transmitted to the imaging device.
3 more elements
Dependencies are inferred from the claim text.