White-Light Optical Information Processing and Holography.
Annual rept. 15 Mar 84-14 May 85,
PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ELECTRICAL ENGINEERING
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Explored is the possibility of using natural solar light for Holographic image processing. The advantage of this technique is the processing system does not require to carry its own light source. It is very suitable for spaceborne and satellite application. Developed is a technique of measuring the noise performance of a white light processor. A programmable Magneto-optic spatial light modulator is applied to white light signal processing. The MOSLM responds to polarized light, which offers the advantage of color coding signal processing. The most important aspect of this device must be the programmability, for which a real time programmable optical processor can be realized in practice. A technique is developed for generating a Fourier transform hologram with a white light source. This technique is very suitable for reconstructing color hologram images with white-light processing. So is a technique of generating a spatial frequency color coded speech spectrogram with a white light optical system. This system not only offers a low cost alternative but also eliminated the complicated programming procedure with digital counterpart. A spatial encoding technique is developed for color image retrieval so that the annoying moire fringes can be eliminated.