نتایج جستجو برای: physical optics

تعداد نتایج: 694911  

Journal: :The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science 1840

Journal: :IEEE Transactions on Antennas and Propagation 1988

2009
V. Nourrit

Though developed out of physics and optics, the optometric profile in the UK has shifted towards a healthcare professional. As a result, optometry students are now stretched between numerous courses as diverse as microbiology, legal aspects related to practice, mathematics, vision or pharmacology. The importance of optics is still affirmed by regulating bodies and universities worldwide, but ma...

2012
Y. M. Wu L. J. Jiang W. C. Chew

Abstract—In this work, we use the numerical steepest descent path (numerical SDP) method in complex analysis theory to calculate the highly oscillatory physical optics (PO) integral with quadratic phase and amplitude variations on the triangular patch. The Stokes’ phenomenon will occur due to various asymptotic behaviors on different domains. The stationary phase point contributions are careful...

2009
A. C. Durgun

In this paper, a novel algorithm for computing Physical Optics (PO) integrals is introduced. In this method, the integration problem is converted to an inverse problem by Levin’s integration algorithm. Furthermore, the singularities, that are possible to occur in the applications of Levin’s method, are handled by employing trapezoidal rule together with Levin’s method. Finally, the computationa...

2013
Richard C. G. Smith John Marciante

Optical interferometry has been used for over a century for precision metrology. Advances in interferometry, such as the inclusion of a laser source, have increased the precision of such interferometers. In this thesis, we examine a fiber-fed, heterodyne, spatially separated, differential wavefront interferometer. The combination of technology in this interferometer can allow easier and more ro...

Journal: :Pattern Recognition Letters 2006
Beatriz Grafulla-González Katia Lebart Andrew R. Harvey

We describe the physical-optics modelling of a millimetre-wave imaging system intended to enable automated detection of threats hidden under clothes. This paper outlines the theoretical basis of the formation of millimetre-wave images and provides the model of the simulated imaging system. Results of simulated images are presented and the validation with real ones is carried out. Finally, we pr...

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