Electromagnetic field near the focus of wide-angular lens and mirror systems
- 1 January 1977
- journal article
- Published by Institution of Engineering and Technology (IET) in IEE Journal on Microwaves, Optics and Acoustics
- Vol. 1 (4) , 129-132
- https://doi.org/10.1049/ij-moa.1977.0015
Abstract
The time-averaged electric energy density near the focus of a parabolic mirror of wide-angular aperture is calculated and compared with that of an aplanatic lens system. The distributions exhibit great differences, the mirror showing a greater departure from circular symmetry, a more complicated structure and increased sidelobes. The vectorial integral representation of Wolf is derived from the Stratton-Chu formula.Keywords
This publication has 2 references indexed in Scilit:
- Electromagnetic diffraction in optical systems, II. Structure of the image field in an aplanatic systemProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1959
- Electromagnetic diffraction in optical systems - I. An integral representation of the image fieldProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1959