J. A. Arnaud
Proceedings of the IEEE (Volume:59 , Issue: 9 ), pages 1378 – 1379, Sept. 1971
The modes of propagation of optical beams in helical gas lenses are obtained in closed form, within the approximation of Gauss, with the help of a quasigeometrical optics method.
LIEN VERS L’ARTICLE : MODES OF PROPAGATION OF OPTICAL BEAMS IN HELICAL GAS LENSES