Security system with optical key access

Abstract

In this work we present a security system that uses an optical key as control access device. The optical key is a computer generated hologram (CGH) recorded using optical damage onto a transparent material using a high power pulsed laser. When we reproduce the CGH with a laser we obtain the codified image on the holographic plane. Placing a camera in this plane the reconstructed image is captured. Using a comparing program that contains the prerecorded security image the access is authorized or denied.