Patent ID: 6728011
Filing Date: 2004-04-27
Classification: H04N

Abstract:
A method of adjusting scanner photoelectric module having a charge-coupled device and a lens, comprising the following steps:protecting a reference pattern to the charge-coupled device through the lens for generating an image signal corresponding to the charge-coupled device; determining a value of MTF of said scanner photoelectric module in a horizontal direction and a vertical direction; and determining margins and a horizontal status of said scanner photoelectric module; wherein said reference pattern comprises a first line set having a plurality of parallel straight lines vertical to the scan direction of said scanner photoelectric module and a second line set having a plurality of parallel slant lines diagonal to the scan direction of said scanner photoelectric module, and the first line set and the second line set are on the same plane parallel to the scan direction; and said reference pattern further comprises two blocks being respectively and symmetrically configured on each of the two sides thereof, the blocks being increasing/decreasing in width, with one side vertical to the scan direction.