2 November 1993 Closed-loop optimimization of quasi-inhomogeneous optical coatings
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Errors inherent to the approximateness and incompleteness of the inverse Fourier transformation techniques can be partly compensated by using successive approximations. Especially interesting is the situation where it is possible to optimize the primary approximate solution efficiently by means of repeated iterations on unchanged conditions (closed loop optimizations). It is shown that the degree of convergence of the closed loop optimization process and the obtainable result depend on the actual choice of Q-function. The results are similar when the closed loop optimizations are performed prior to and after conversion into a two-indexed quasi-inhomogeneous solution employing double layer equivalents. The subject of the optimization of the number of layers in the two-index solution is discussed and a couple of new Q-functions that are better suited for closed loop optimizations of both converted and unconverted coatings than some of the best known existing Q-functions are presented.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Henrik Fabricius, Henrik Fabricius, "Closed-loop optimimization of quasi-inhomogeneous optical coatings", Proc. SPIE 2046, Inhomogeneous and Quasi-Inhomogeneous Optical Coatings, (2 November 1993); doi: 10.1117/12.163545; https://doi.org/10.1117/12.163545

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