Apodized annular-aperture logarithmic axicon: smoothness and uniformity of intensity distributions
- 15 November 1993
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 18 (22) , 1893-1895
- https://doi.org/10.1364/ol.18.001893
Abstract
We show that the apodized annular-aperture logarithmic axicon preserves excellent uniformity of the on-axis intensity, energy flow, and lateral resolution. Numerical evaluation of the Fresnel diffraction integral leads to results very close to geometrical-optics predictions. Once again the geometrical law of energy conservation turns out to be a useful tool in designing axicons.Keywords
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