Focal shift and focal switch of flat-top
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Bin Tang; Wei Wen
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Article
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2009
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Elsevier Science
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English
β 404 KB
By introducing a hard aperture function into a finite sum of complex Gaussian functions, an approximate analytical expression predominating the distribution of axial intensity for the flat-topped Mathieu-Gauss (FTMG) beams passing through a system with the aperture and lens separated has been derive