| 摘要 |
The structure has an irregularity in its grid spacing to ensure uniformity of optical output, regarding of diffraction effects. The inductive grid structure comprises an elementary mesh (m1, m2) whose edges (c1, c2) are made of electrically conducting wire. The average coverage rate of the elementary mesh is sufficiently high that the structure serves as a screen in a given hyperfrequency spectral domain. At the same time the coverage is sufficiently light that the structure is substantially transparent in a given optical spectral domain. The edges of the mesh (mi, mj) are orientated in a sufficiently irregular manner to ensure that the diffraction energy in the optical spectral domain is more uniform than would be the case with a periodic grill. |
