Journal
OPTICS COMMUNICATIONS
Volume 277, Issue 2, Pages 397-405Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2007.05.031
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We discussed the radial intensity distribution in the presence of spherical aberrations (SA) for cases in which the incident field is a focused Gaussian spot. A numerical solution of a two dimensional integral diffraction (paraxial ray) equation for a relatively large SA is developed by using the well-known trapezoidal rule for integration. The mesh size was chosen so that convergence of the integration is insured to one part in 10(-8) at successive steps. The spot size and the radial intensity distribution in both SA free lens and lens exhibiting SA are calculated. A relation that determines the spot size at the geometrical focus in aberrated case is developed. (c) 2007 Elsevier B.V. All rights reserved.
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