Incoherent acousto-optic image correlator with the kinoform

Sergey N. Starikov; Vladislav G. Rodin; Ivan V. Solyakin; Ekaterina A. Shapkarina; Alexander P. Chervonkin

doi:10.1117/12.541780

12 April 2004 Incoherent acousto-optic image correlator with the kinoform

Sergey N. Starikov, Vladislav G. Rodin, Ivan V. Solyakin, Ekaterina A. Shapkarina, Alexander P. Chervonkin

Proceedings Volume 5437, Optical Pattern Recognition XV; (2004) https://doi.org/10.1117/12.541780
Event: Defense and Security, 2004, Orlando, Florida, United States

Abstract

Fourier holograms are commonly used for reference images storing in diffraction correlators with spatially coherent or spatially incoherent illumination. Kinoforms can be a real alternative to Fourier holograms in the correlators. The kinoform represents a computer-synthesized optical element which performs only a phase modulation of a light wave. The kinoform restores true intensity of the recorded image and random distribution of phase. Therefore, it can be utilized for storing reference images, first of all, in correlators with spatially incoherent illumination. The absence of carrier frequency reduces demanded number of pixels of the spatial light modulator being used. Since the kinoform provides reconstruction of reference image in zero diffraction order, requirement on monochromaticity of illumination are decreased as well. The diffraction correlator with the kinoform used as spatial frequency filter is considered. The 2-D acoustooptic deflector was employed to form input images in real time by monochromatic spatially incoherent light. The reference images were recorded on the commercially available kinoforms. The input and reference images were of 256×256 pixels and 200×200 pixels respectively. Since input images were consisted of approximately 400 pixels with non-zero brightness, the image update frequency was gained at 200 Hz. The experimental setup and experimental results on images recognition are presented.

Citation Download Citation

Sergey N. Starikov, Vladislav G. Rodin, Ivan V. Solyakin, Ekaterina A. Shapkarina, and Alexander P. Chervonkin "Incoherent acousto-optic image correlator with the kinoform", Proc. SPIE 5437, Optical Pattern Recognition XV, (12 April 2004); https://doi.org/10.1117/12.541780

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