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23 October 2003 Four-operand parallel optical logic gates using shadow casting
R. S. Fyath, S. A. Ali, M. S. Alam
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Proceedings Volume 5202, Optical Information Systems; (2003) https://doi.org/10.1117/12.503886
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States
Abstract
Optical shadow-casting (OSC) technique is seriously being considered as an efficient method that is capable of optically implementing two-operand parallel logic gates and array logic systems. The sixteen logic functions for two binary patterns (variables) are optically realizable in parallel by properly configuring an array of 2×2 light emitting diodes. In this paper, we propose an enhanced OSC technique for implementing four-operand parallel logic gates. The proposed system is capable of performing 216 logic functions by simply programming the switching mode of an array of 4×4 light emitting diodes in the input plane. This leads to an efficient and compact realization scheme when compared to the conventional two-operand OSC system.
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R. S. Fyath, S. A. Ali, and M. S. Alam "Four-operand parallel optical logic gates using shadow casting", Proc. SPIE 5202, Optical Information Systems, (23 October 2003); https://doi.org/10.1117/12.503886
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KEYWORDS
Light emitting diodes
Logic
Logic devices
Switching
Binary data
Computer programming
Optical logic
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