| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1538936 | Optics Communications | 2007 | 6 Pages |
Abstract
The properties of tight dark focal spot created using a simple circular π phase plate are presented. For focusing elements with low numerical aperture, the focal plane intensity has r4 dependence, while for focusing elements with high numerical aperture, vectorial diffraction effects become important, and the focal plane intensity surprisingly approaches r2 dependence, indicating a much tighter dark spot.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Nándor Bokor, Nir Davidson,