HIGH ENTRANCE ANGLE RETROREFLECTIVE ARTICLE WITH SPHERICAL REFRACTING ELEMENTS
摘要
<p>Retroreflective article (80) that provides effective retroreflective brightness at very high entrance angles as well as low entrance angles and under wet conditions. The article comprises spherical refracting elements (60) having an index of refraction above 1.35 and below 1.75 adhered to the cover (66) film of an enclosed-lens retroreflective base sheet.</p>
