1.
Opt Lett
; 18(22): 1893-5, 1993 Nov 15.
Article
in English
| MEDLINE
| ID: mdl-19829438
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.