Demonstration of a fast computer generated hologram algorithm based on amplitude-phase modulation with random mask for an optical ID system

In this paper, a new amplitude and phase modulation computer generated hologram algorithm with random mask is presented for use in an ID tag application system and the process of generation and reconstruction of the optical ID pattern is described. This new APM-CGH algorithm improves the weakness of the previous optical ID systems using kinoform. In this method, a technique of randomization of the input data is introduced prior to a Fourier transform, and as a result DC components are localized at the center region of only one pixel, regardless of input data.