Image scanning device having a system for determining the distance to a target

The picture scanner (12) containing the system (404, 604) for measuring the distance (Z) to the target for a scan is offered. A picture scanner contains the optical system and picture sensor array (403, 603) for converging an optical beam and carrying out imaging of the target. This equipment contains the autofocus system for adjusting the position of an optical system, in order to adjust a focus preferably and to image the picture of a target on a picture sensor array. In one enforcement form of a picture scanner, distance is measured by analyzing the コリメイト (ed) aiming pattern which is formed by コリメイト (ing) an optical beam. In another enforcement form, distance is measured by analyzing the speckle pattern produced according to the speckle effect when the optical beam hit the target.