Patent Number: 8,585,222

Title: Method of coating a retroreflector to avoid reflecting visible light

Abstract: This describes an enhanced retro-reflector that is designed to be a retro-reflector of non-visible light, but not visible, and can be designed to resemble common dust or dirt in the visible spectra. As the beads retro-reflect very little visible light they are not easily seen in visible light; thus they are difficult to counterfeit.

Inventors: Bernath; Robert (Orlando, FL), Stoltz; Richard (Plano, TX), Bullington; Jeff (Chuluota, FL)

Assignee: TIA Systems, Inc.

International Classification: G02B 5/122 (20060101)

Expiration Date: 1/19/12018