LCD based electro-optical processor for discrete algorithms

Ernst H. Lueder

doi:10.1117/12.447748

8 November 2001 LCD based electro-optical processor for discrete algorithms

Ernst H. Lueder

Proceedings Volume 4457, Spatial Light Modulators: Technology and Applications; (2001) https://doi.org/10.1117/12.447748
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

The electro-optical analog processor for discrete algorithms like the discrete Fourier transform (DFT) or filtering contains as components an LCD as picture source, a lens array for the duplication of the picture, a second LCD or a mask as multiplier and a sensor array for the addition of the results. It works with incoherent light. The components perform a massive parallel processing, the speed, bandwidth and data rate of which are discussed. The set of space discrete equations of the algorithms such as a DFT are translated into the architecture of a compact processor sized 8.5 cm in diameter and 17 cm long. The microlenses and the multiplier are clamped together tightly which renders them immune against vibrations and shocks. Examples for the DFT and for a DCT are given. The errors lie in the range of 4% to 11%, the latter for a 2-bit only processing.

Citation Download Citation

Ernst H. Lueder "LCD based electro-optical processor for discrete algorithms", Proc. SPIE 4457, Spatial Light Modulators: Technology and Applications, (8 November 2001); https://doi.org/10.1117/12.447748

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