Article ID Journal Published Year Pages File Type
10428979 Optik - International Journal for Light and Electron Optics 2005 5 Pages PDF
Abstract
The focal switch of Hermite-Gaussian beams diffracted at an aperture and subsequently focused by a spherically aberrated lens is studied. Our main attention is focused on the effect of quartic-phase aberrations on the behavior of the focal switch. It is shown that quartic-phase aberrations affect the relative focal shift Δzf, turning position s1,t, and relative transition height Δzsw. Apart from a critical maximum truncation parameter αc,max, there is a critical minimum truncation parameter αc,min. Within the region αc,min<α<αc,max the focal switch can take place, but quartic-phase aberrations give rise to a decrease of αc,max-αc,min in comparison with the aberration-free case.
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Physical Sciences and Engineering Engineering Engineering (General)
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