ACTIVE ELECTRO-OPTICAL IDENTIFICATION

摘要

A system, comprising: an electro optical identification tag comprising a retroref lective layer, a light modulator positioned over the retroref lective layer, and a control unit capable of modulating the light modulator according to a communication code; and an electro-optical transceiver comprising a light source capable of illuminating the optical identification tag and further comprising an optical sensor capable of receiving a signal reflected from the optical identification tag.