Patent ID: 6339482
Filing Date: 2002-01-15
Classification: H04N

Abstract:
A method of positioning a lens in a multiple lens scanner, comprising the steps of:a) setting a mark on a linear scanning range; b) scanning said linear scanning range through a lens which is correctly positioned in a scanning position, wherein said mark is scanned into a first scanned pixel on a CCD; c) recording the position of said first scanned pixel as a standard pixel position; d) moving said lens while said lens is not correctly positioned; e) scanning said linear scanning range through said lens wherein said mark is scanned into a second scanned pixel on said CCD; f) deciding whether said second scanned pixel is closed to said first scanned pixel as well as the position of said standard pixel position, if not, moving said lens and returning to step e; and g) stopping the movement of said lens when said second scanned pixel matches said first scanned pixel.