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US 6,185,053 B2Granted
Resolution adjusting device
AssigneeMustek Systems Inc.
InventorJenn-Tsair Tsai
Life of this patent
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Abstract
A device for adjusting a resolution of an image-pickup apparatus in horizontal and vertical directions is disclosed. The resolution adjusting device includes a diagonal pattern for providing an image to be received by the photoelectric conversion device to obtain an adjusted resolution by adjusting a position of the focusing device according to the image.
Claims7
A resolution adjusting device positioned on a scanning surface of an image scanning apparatus before adjusting the resolution, wherein said image scanning apparatus has a focusing device and a photoelectric conversion device comprising:
- a diagonal pattern for providing an image to be received by said photoelectric conversion device to obtain an equilibrium point of the resolution in the horizontal and vertical directions by adjusting a position of said focusing device according to said image.
Dependencies are inferred from the claim text.