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Orthogonal Sequence Modulated Phase Reflection Gratings for Wide-Band Diffusion

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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.

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