A visual sensor system includes a moving object movable along a two-dimensional plane, and a one-dimensional array of photosensitive means fixedly mounted on the moving object. The photosensitive means are arranged in such a manner that the array is located within a first plane substantially perpendicular to a central axis of a line of sight and forms, within the second plane, a given angle with a line intersecting a second plane containing the central axis of the line of sight and substantially perpendicular to the two-dimensional plane.