Creating a spherical focal spot with spatially modulated radial polarization in 4Pi microscopy
Creating a spherical focal spot with spatially modulated radial polarization in 4Pi microscopy
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DOI：
10.1364/ol.34.002444
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发表时间：
2009-08-15
期刊：
影响因子：
3.6
通讯作者：
Zhan, Qiwen
中科院分区：
文献类型：
--
作者：
Chen, Weibin;Zhan, Qiwen
提出了一种在4Pi显微镜中获得衍射极限球形焦斑的方法。结合偶极子天线辐射方向图和Richards-Wolf矢量衍射方法，通过求解反问题，可以解析地得到产生球面光斑的消球差物镜光瞳面上的输入场。在光瞳平面所需的字段被发现是一个径向偏振与空间振幅调制。利用空间相位调制，还可以得到两个相同的球形光斑，它们具有衍射极限尺寸和沿光轴沿着可变的距离。(C)2009年美国光学学会
We propose an approach to obtain a diffraction-limited spherical focal spot in 4Pi microscopy. By combining the dipole antenna radiation pattern and the Richards-Wolf vectorial diffraction method, an input field at a pupil plane of aplanatic objective lenses for generating a spherical spot can be found analytically by solving the inverse problem. The required field at the pupil plane is found to be a radial polarization with spatial amplitude modulation. With spatial phase modulation, two identical spherical spots with diffraction-limited size and variable distance along the optical axis can also be obtained. (C) 2009 Optical Society of America