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- W2063485185 abstract "The goal of this paper is the analysis of the wavefield in the vicinity of the simple two dimensional caustics. The caustics and the focuses are the objects of interest of many technical applications.Ten years ago it seemed that due to packets of the special functions stored in memory of computer evaluation of the field in the caustic area and in focuses will become the simple procedure. Nothing such occurred excepting the access to the special functions. On the example of the simplest case the caustic with one cusp was shown how the problem of evaluation of the amplitude may be overcome.For the appearing of caustics are responsible the concave fragments of the wavefront. From many possibilities we choose to consider the concavity which produces at the plane closing it cosine phase function (formula in paper)and the unity amplitude. Thus, our elementary task is simplified to the niche, which acts as cosine phase filter. The calculations were carried out on the cross section from the caustic to their asymptote using several methods. The first rough estimation was obtained on the grounds of knowledge of created caustic type and focusing index. Then it was shown as the stationary phase method which fails in this region is helpful besides of overlapping of active regions. The obtained results were compared with these obtained due to Kirchhoff s integral." @default.
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- W2063485185 date "2003-11-21" @default.
- W2063485185 modified "2023-10-17" @default.
- W2063485185 title "Amplitude evaluation in caustic area" @default.
- W2063485185 doi "https://doi.org/10.1117/12.545103" @default.
- W2063485185 hasPublicationYear "2003" @default.
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