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titleOfInvention Lens with variable focal length
abstract A system and method for scanning a bar code target by continuously varying the focal range of a bar code scanning system. A light source is provided for generating light rays, and a lens is provided for focusing the light rays. The lens has a variable focal length. The focused light rays are scanned across the bar code target with a beam scanner. While the focused light rays are being scanned, the focal length of the lens is continuously varied.
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