Method and apparatus for detecting the edge of an imaging media

Details Method and apparatus for detecting the edge of an imaging media Method and apparatus for detecting the edge of an imaging media

G - Physics

01

B

G01B 11/02 (2006.01) B41J 11/00 (2006.01) B65H 9/20 (2006.01) B65H 43/08 (2006.01) G01B 11/04 (2006.01) G01N 21/86 (2006.01) H04N 1/06 (2006.01)

Patent

CA 2429550

A system for determining the location of an edge of a sheet of media for alignment purposes utilizes a beam of light directed at the media surface to produce a reflected light beam. The reflected light beam intensity varies in response to the reflectivity of the surface on which it impinges and the beam position shifts in accordance with the datum of the surface at which the reflected beam is originated. By monitoring both intensity and positional information of the reflected beam as it is scanned across the media edge, the edge location can be determined using a weighted combination of the intensity and positional information.

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