Spot size and radial intensity distribution of focused Gaussian beams in spherical and non-spherical aberration lenses
✍ Scribed by Abdu A. Alkelly
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 805 KB
- Volume
- 277
- Category
- Article
- ISSN
- 0030-4018
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✦ Synopsis
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 À8 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.