Tight parabolic dark spot with high numerical aperture focusing with a circular π phase plate

被引：29
作者：
Bokor, Nandor
Davidson, Nir
机构：
[1] Budapest Univ Technol & Econ, Dept Phys, H-1111 Budapest, Hungary
[2] Weizmann Inst Sci, Dept Phys Complex Syst, IL-76100 Rehovot, Israel
来源：
OPTICS COMMUNICATIONS | 2007年 / 270卷 / 02期
关键词：
D O I：
10.1016/j.optcom.2006.09.022
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The properties of tight dark focal spot created using a simple circular it phase plate are presented. For focusing elements with low numerical aperture, the focal plane intensity has r(4) dependence, while for focusing elements with high numerical aperture, vectorial diffraction effects become important, and the focal plane intensity surprisingly approaches r(2) dependence, indicating a much tighter dark spot. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：145 / 150
页数：6
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