VISABLY TRANSPARENT RETROREFLECTIVE MATERIALS

摘要

A retroreflective material (100, 101, 102 and 103) that comprises a retroreflective element (20, 20uv and 20ir) that is adapted to transmit energy from the visible spectrum while simultaneously reflecting energy from the non-visible spectrum such as UV or IR. In their microspheric optical body form, the materials (100, 101, 102 and 103) comprise a substantially visible transparent microscopic bead (22) underneath which a reflector (24, 24uv and 24ir) is placed. Reflector (24uv) narrowly reflects some or the entire ultraviolet spectrum while reflector (24ir) narrowly reflects some or the entire IR spectrum. Generic reflector (24) may reflect a sub-portion of the visible spectrum such as red light. Materials (100, 101, 102 and 103) may be augmented with fluorescent compounds embedded within either bead (22f) itself or into a fluorescent matrix layer (23) placed between the underside of bead (22) and reflector (24, 24uv and 24ir) forming fluorescent retroreflective materials (104 and 105).