Patent ID: 8615612
Filing Date: 2013-12-24
Classification: G06F,H01R

Abstract:
1. An optical authentication system, comprising: a first portion of the optical authentication system disposed in an item to be authenticated, the first portion of the optical authentication system comprising a first volume of a first optical media having a first index of refraction, and first volume of a second optical media having a second index of refraction, and a first periodic interface between the first volume of the first optical media and the first volume of the second optical media, and a collimated light source; and a second portion of the optical authentication system disposed in an authenticator, the second portion of the optical authentication system comprising a second volume of the first optical media, a second volume of the second optical media, a second periodic interface between the second volume of the first optical media and the second volume of the second optical media, and a photodetector; and wherein the first portion of the optical authentication system and the second portion of the optical authentication system are configured to couple such that the first volume of the second optical media contacts the second volume of the second optical media; wherein collimated light source is configured to direct collimated light through the periodic interface from the first volume of the first optical media to the first volume of the second optical media and through the second periodic interface from the second volume of the second optical media to the second volume of the first optical media to cause light to exit the second volume of the first optical media; and wherein the second volume of the second optical media have a combined thickness such that the light that exits the second volume of the first optical media is collimated if the first interface and the second interface are copies.