IMAGING MODULE, IMAGE FORMING LENS AND CODE READING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an imaging module of a simple structure which has a resolving power enough to meet required specifications for both photographing a close object and photographing a far object. SOLUTION: The imaging module 1 includes: an image forming lens 10 having an increased depth of field and a decreased curvature of field; and a sensor 11 provided between a location 3 of a best image surface of the image forming lens 10 with respect to white light from a sunflower 5 and a location 4 of a best image surface of the image forming lens 10 with respect to white light from a tree 6. COPYRIGHT: (C)2011,JPO&INPIT