| Review of the Hidden Rays of Diffraction |
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Se-Yun Kim |
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Imaging Media Research Center, Korea Institute of Science and Technology |
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| Abstract |
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A high-frequency analysis technique, called the hidden rays of diffraction (HRD), is reviewed in this paper. The physical optics and the rigorous diffraction coefficients of a perfectly conducting wedge illuminated by a plane wave are compared. The physical existence of hidden rays on the shadow boundary is explained in view of the geometric theory of diffraction (GTD). In particular, a systematic tracing of hidden rays and its visualization are precisely described by introducing the concept of the supplementary boundary. The physical meaning of the null-field condition in the complementary region is also explained. |
| Key words:
Diffraction, Edge, Physical Optics, Ray-Tracing, Wedge |
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