Focusing properties of Gaussian beam by a nonspiral phase plate system

被引：0
作者：
Li, Jinsong [1 ,2 ]
Gao, Xiumin [3 ]
Wang, Jian [3 ]
Zhuang, Songlin [2 ]
机构：
[1] China Jiliang Univ, Coll Opt & Elect, Hangzhou 310018, Peoples R China
[2] Shanghai Univ Sci & Technol, Coll Opt & Elect, Shanghai 20093, Peoples R China
[3] Hangzhou Dianzi Univ, Elect & Informat Coll, Hangzhou 310018, Peoples R China
来源：
OPTIK | 2008年 / 119卷 / 14期
基金：
中国国家自然科学基金;
关键词：
Gaussian beam; Nonspiral phase plate; Intensity distribution; Vector diffraction theory;
D O I：
10.1016/j.ijleo.2007.06.001
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this article, a nonspiral plate is investigated numerically by vector diffraction theory to observe the focusing properties of Gaussian beams. Both low- and high-numerical-aperture (NA) optical systems are considered in the investigation. It is found that the parameter of NA and the phase vary rate of the phase plate influence the focal intensity distribution considerably. When a nonspiral plate is used to provide linear phase variation on one half of the Gaussian beam, it may adjust the focal spot considerably and conveniently. Changing the vary rate of the phase plate or the parameter of NA can alter optical intensity distribution; some novel focal spots and focal switch may also occur. (C) 2007 Elsevier GmbH. All rights reserved.
引用
收藏
页码：671 / 681
页数：11
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