Transfer Function for an Annular Aperture*
- 1 April 1956
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 46 (4) , 285-288
- https://doi.org/10.1364/josa.46.000285
Abstract
A method of evaluating the two-dimensional Fourier transform of the point image intensity distribution for an annular aperture is presented. Since all three integrals involved are of the same basic form, it is shown that an analytic solution can be obtained by integrating the general expression with respect to a parameter. The result agrees with Steel’s expression obtained by convolving the aperture function with its complex conjugate. A family of transfer functions is then plotted with the ratio of inner to outer radius of the annulus as a parameter.Keywords
This publication has 1 reference indexed in Scilit:
- The Resolution of Two Particles in a Bright Field by Coated Microscope ObjectivesJournal of the Optical Society of America, 1949