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Opt Express. 2002 Aug 12;10(16):728-39.

Stable aggregates of flexible elements give a stronger link between rays and waves.


A recently proposed ray-based method for wave propagation is used to provide a meaningful criterion for the validity of rays in wave theory. This method assigns a Gaussian contribution to each ray in order to estimate the field. Such contributions are inherently flexible. By means of a simple example, it is shown that superior field estimates can result when the contributions are no longer forced to evolve like parabasal beamlets.


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