Intuitive explanation of the phase anomaly of focused light beams
- 1 July 1980
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 70 (7) , 877-880
- https://doi.org/10.1364/josa.70.000877
Abstract
An intuitive argument is presented for the phase anomaly, that is, the 180° phase shift of a light wave in passing through a focus. The treatment is based on the geometrical properties of Gaussian light beams, and suggests a new viewpoint for understanding the origin of the phase shift. Generalizing the argument by including higher-order modes of the light field allows the case of a spherical wave to be treated.Keywords
This publication has 4 references indexed in Scilit:
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- Phase Distribution near Focus in an Aberration-free Diffraction ImageProceedings of the Physical Society. Section B, 1956
- On the Anomalous Propagation of Phase in the FocusPhysical Review B, 1938
- Das Verhalten von Lichtwellen in der Nähe eines Brennpunktes oder einer BrennlinieAnnalen der Physik, 1909