Topic
Physical optics
About: Physical optics is a research topic. Over the lifetime, 5342 publications have been published within this topic receiving 101388 citations. The topic is also known as: wave optics.
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TL;DR: In this article, the existence of boundary diffraction wave pulses was demonstrated by measuring the spectrum and the radial intensity distribution of the diffracted femtosecond pulses behind a circular aperture.
23 citations
TL;DR: An overview of the utilization of fractals in physical optics, especially of Koch fractals and their diffractals, is given in this paper, where the most typical Koch curves are also depicted.
23 citations
23 citations
TL;DR: Compared vision with lathe-manufactured multi-zone multifocal, angularly and radially, segmented surfaces and through the same corrections simulated with a SLM in a custom-developed two-active-element AO visual simulator, it was found that perceived visual quality measured through real manufactured surfaces and SLM-simulated phase maps corresponded highly.
Abstract: Spatial-light-modulators (SLM) are increasingly used as active elements in adaptive optics (AO) systems to simulate optical corrections, in particular multifocal presbyopic corrections. In this study, we compared vision with lathe-manufactured multi-zone (2-4) multifocal, angularly and radially, segmented surfaces and through the same corrections simulated with a SLM in a custom-developed two-active-element AO visual simulator. We found that perceived visual quality measured through real manufactured surfaces and SLM-simulated phase maps corresponded highly. Optical simulations predicted differences in perceived visual quality across different designs at Far distance, but showed some discrepancies at intermediate and near.
23 citations
TL;DR: It is shown that the extinction cross sections have a frequency dependence and an incidence angle dependence similar to those associated with the physical optics approximation, and they have a particle shape dependence similar with the quasi-static approximation.
Abstract: A reformulated integral equation is solved inside an elliptic disk particle for an electromagnetic field formulation bridging the quasi-static and the physical optics approximations. The scattering amplitude tensor elements associated with such a field formulation are derived and then used to formulate the extinction cross sections. It is shown that the extinction cross sections have a frequency dependence and an incidence angle dependence similar to those associated with the physical optics approximation, and they have a particle shape dependence similar to that associated with the quasi-static approximation. Furthermore, at the high-frequency limits, it is shown that those cross sections could reach the value known in the literature by the extinction paradox, namely, twice the particle geometric shadow area.
23 citations