| 摘要 |
An antireflective coating that is effective over an extended spectral region for a wide range of angles of incidence includes a number of homogeneous layers of equal optical thicknesses having small and constant differences (deltan) between the refractive indices of two adjacent sublayers. The adjacent layers with small differences in refractive indices n have been removed from the coating when the AR performance, angular variation, and the bandwidth of the coating did not degrade beyond an acceptable threshold.
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