METHOD FOR PRODUCING LOW-VISIBILITY RETROREFLECTIVE VISUAL TAG

摘要

PROBLEM TO BE SOLVED: To provide a visual tag whose position can easily be identify and which does not impair the outward shape of an object. SOLUTION: A process involves placing an infrared-blocking material over a retroreflective substrate 202 to form the low-visibility retroreflective visual tag. This infrared-blocking material is placed so as to form a pattern, which becomes visible to an infrared sensor when the low-visibility retroreflective visual tag is illuminated by an infrared light source. COPYRIGHT: (C)2007,JPO&INPIT