Electromagnetic field near the focus of wide-angular lens and mirror systems
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.
- Publication:
-
IEE Journal of Microwaves Optics and Acoustics
- Pub Date:
- July 1977
- Bibcode:
- 1977JMOA....1..129S
- Keywords:
-
- Electromagnetic Fields;
- Paraboloid Mirrors;
- Wide Angle Lenses;
- Green'S Functions;
- Integral Equations;
- Polarization (Waves);
- Radiant Flux Density;
- Vector Analysis;
- Instrumentation and Photography