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Proceedings Paper

Implementation of a holographic optical memory system using a new input and angular multiplexing method
Author(s): Cheol Su Kim; SeungHee Lee; Seong-Wan Kim; Jong-Yun Kim; Se-Joon Park; Soo-Joong Kim
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Paper Abstract

In this paper, we implemented a holographic optical memory system which can store and reconstruct many image types using a new input and angular multiplexing methods. As a new input method, the phase information of an image is input in the recording material instead of the brightness information. To do so, we represented the images, which were captured with a CCD camera or displaced on a computer monitor, on a liquid crystal television (LCTV) without a polarizer/analyzer. Therefore, we could achieve a uniform beam power regardless of the total brightness of the input image, and could apply a conventional scheduled recording method for the determination of the recording time for all the images needing to be stored. The reconstructed image was acquired by transforming the phase information into brightness information using an analyzer. The reference beam was generated by a Fourier transform of a binary phase hologram which was designed with a simulated annealing algorithm on a LCTV. The LCTV was then interfaced with a computer. The proposed optical memory system is stable because the incident angle of the reference beam is controlled electronically by computer. We demonstrated the system using an optical experiment which stored and reconstructed various types of images in a 45 degree cut BaTiO3 using the proposed holographic memory system.

Paper Details

Date Published: 22 June 1998
PDF: 0 pages
Proc. SPIE 3419, Optoelectronic Materials and Devices, 34191G (22 June 1998); doi: 10.1117/12.311039
Show Author Affiliations
Cheol Su Kim, Kyongju Univ. (South Korea)
SeungHee Lee, Taekyeung Junior College (South Korea)
Seong-Wan Kim, Kyungpook National Univ. (South Korea)
Jong-Yun Kim, Kyungpook National Univ. (South Korea)
Se-Joon Park, Kyungpook National Univ. (South Korea)
Soo-Joong Kim, Kyungpook National Univ. (South Korea)

Published in SPIE Proceedings Vol. 3419:
Optoelectronic Materials and Devices
Marek Osinski; Yan-Kuin Su, Editor(s)

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