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光子学报 2009
Focusing Properties of Non-uniformly Polarized Beams through an Astigmatic Lens with Annular Aperture
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Abstract:
By means of the beam coherence-polarization(BCP) matrix formulation and generalized Huygens-Fresnel diffraction integral,the properties of non-uniformly polarized(NUP) beams focused by an astigmatic lens with annular aperture were studied,where the circular aperture is treated as a special case by letting inner radius of the annular aperture b=0.The dependence of position of real focus,intensity and degree of polarization distributions on the lens astigmatism,Fresnel number and obscure ratio of the annular ...