Implementation of a holographic optical memory system using a new input and angular multiplexing method

Cheol Su Kim; SeungHee Lee; Seong-Wan Kim; Jong-Yun Kim; Se-Joon Park; Soo-Joong Kim

doi:10.1117/12.311039

22 June 1998 Implementation of a holographic optical memory system using a new input and angular multiplexing method

Cheol Su Kim, SeungHee Lee, Seong-Wan Kim, Jong-Yun Kim, Se-Joon Park, Soo-Joong Kim

Proceedings Volume 3419, Optoelectronic Materials and Devices; 34191G (1998) https://doi.org/10.1117/12.311039
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

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.

Citation Download Citation

Cheol Su Kim, SeungHee Lee, Seong-Wan Kim, Jong-Yun Kim, Se-Joon Park, and Soo-Joong Kim "Implementation of a holographic optical memory system using a new input and angular multiplexing method", Proc. SPIE 3419, Optoelectronic Materials and Devices, 34191G (22 June 1998); https://doi.org/10.1117/12.311039

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