Imaging module and reader for, and method of, reading a target over a field of view by image capture with a visually prominent indicator of a center zone of the field of view

摘要

#$%^&*AU2017204329B220181018.pdf#####IMAGING MODULE AND READER FOR, AND METHOD OF, READING A TARGET OVER A FIELD OF VIEW BY IMAGE CAPTURE WITH A VISUALLY PROMINENT INDICATOR OF A CENTER ZONE OF THE FIELD OF VIEW ABSTRACT OF THE DISCLOSURE An imaging sensor (10) of an imaging reader (30) senses return light from a target to be read by image capture along an imaging axis over a field of view (20) that extends along mutually orthogonal, horizontal and vertical axes. Two aiming light (42) assemblies are offset from the sensor (10), and direct an aiming light pattern at the target. The pattern has an aiming mark (60) in a central area of the pattern, and a pair of aiming light lines (50) that are collinear along the horizontal axis. The visibility of the aiming mark is enhanced by optically configuring the aiming mark to be different in brightness relative to a remaining area of the pattern by specially configuring aiming lenses with regions of different optical power to form each aiming light line of non-uniform brightness. The aiming mark of enhanced visibility constitutes a prominent visual indicator of a center zone of the field of view.2/5 40 38 AIMING LIGHT 22 CONTROLLER MEMORY 36 AIMING LIGHT 42 SOURCE rR SOURCE 42 10 ''IMAGING LENS ASSEMBLY 12 AIMING APERTURE APRU 46 AIMING APERTURE [6 46 WINDOW 26xn a n AIMING LENS 44 54 44 AIMING LENS 18 A AIMING FIELD52 Sj 52 AIMING FIELD 48/ 48 IMAGING FOV20 ,,/ / AIMING LINE 0 50A AIMING LINE 5050A 5 0 50B 50B TARGET IMAGE PLANE AIMIN60MARK FIG. 2