US Patent 7518766 Calibration mechanism of a scanner
Patent 7518766 was granted and assigned to Avision on April, 2009 by the United States Patent and Trademark Office.
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A calibration mechanism of a scanner includes a second light source, a calibration element having an opening, a first light source and a scanning module. The second light source is assembled with the calibration element, and the first light source is disposed at a position opposite to the calibration element. During the shading correction, the calibration element is rotated by an angle so that the first light source illuminates on a surface of the calibration element, and the reflected light enters the scanning module. When a transmissive original is being scanned, the light of the second light source passes through the opening of the calibration element and the transmissive original, and then enters the scanning module.
US Patent 07518766 Calibration mechanism of a scanner US Patent 7518766 Calibration mechanism of a scanner
US Patent 07518766 Calibration mechanism of a scanner
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