12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

The mean focal length of an aberrated lens

14 Jul 2011, 08:45


Oral Presentation Track C - Lasers, Optics and Spectroscopy LOS


Mr Cosmas Mafusire (CSIR National Laser Centre)


We outline an approach for the calculation of the mean focal length of an aberrated lens, and provide closed form solutions that show that the focal length of the lens is dependent on the presence of defocus, x-astigmatism and spherical aberration. The results are applicable to Gaussian beams in the presence of arbitrary sized apertures. The theoretical results are confirmed experimentally, showing excellent agreement. As the final results are in algebraic form, the theory may readily be applied in the laboratory if the aberration coefficients of the lens are known.

Level (Hons, MSc, <br> &nbsp; PhD, other)? PhD
Consider for a student <br> &nbsp; award (Yes / No)? Yes
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)? Yes

Primary author

Mr Cosmas Mafusire (CSIR National Laser Centre)


Prof. Andrew Forbes (CSIR National Laser Centre)

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