Variations on the Fresnel Zone Plate
- 1 February 1966
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 56 (2) , 215-217
- https://doi.org/10.1364/josa.56.000215
Abstract
The effects of contrast in the Fresnel zone plate on the amplitude in the focal point due to a normally incident plane wave are obtained by direct evaluation of the Fresnel-Kirchhoff diffraction integral. The change in focal-point amplitude due to smoothing the ordinary, discontinuous, “square-wave” transmission function into a continuous, “sine-wave” function is also calculated. Finally, an expression is derived for the amplitude in the point image due to a plane wave impinging on the zone plate at a small angle of incidence.Keywords
This publication has 1 reference indexed in Scilit:
- Studies of Transmission Zone PlatesAmerican Journal of Physics, 1951