Optical Image Correlation in Photorefractive Mesogenic Composites

by Akira Emoto, Hiroshi Ono, & Nobuhiro Kawatsuki AZojomo, 2 Mar 2006 We demonstrated optical image correlation by means of Fourier transform hologram in the region of Raman-Nath diffraction on to photorefractive mesogenic composites film. Interference field of two Fourier-transformed imaging beams induce periodically molecular reorientation: holographic phase gratings. The reconstructed image is obtained as a result of a spatial correlation between the two optical images. In this work we applied correlation output between two optical images for pattern classification and/or detection according to the self-diffraction. The proposed optical correlation was confirmed with an example of a pattern in the experiments. Read more