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Orthogonal Sequence Modulated Phase Reflection Gratings for Wide-Band Diffusion

Concatenating individual diffusers to form larger ones narrows their diffusion patterns into specific directions. A solution is proposed using the modulation of two orthogonal diffusion structures with binary sequences to achieve the desired diffusion pattern. The technique results in large-area diffusion structures which do not suffer from having narrowed diffusion patterns. They also have an extended frequency range and can be implemented easily using existing diffusers.

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JAES Volume 46 Issue 12 pp. 1109-1118; December 1998
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