Enhanced two-point resolution using optical eigenmode optimized pupil functions
Enhanced two-point resolution using optical eigenmode optimized pupil functions
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DOI：
10.1088/2040-8978/13/10/105707
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发表时间：
2011-10-01
影响因子：
2.1
通讯作者：
Dholakia, K.
中科院分区：
文献类型：
--
作者：
Kosmeier, S.;Mazilu, M.;Dholakia, K.
光瞳滤光片具有任意缩小焦点中央叶的能力。我们将类共焦成像系统的焦场分解为光学本征模式，以确定最佳的光瞳函数，从而提供超分辨扫描光斑。作为这一过程的结果，强度从中央叶重新分布到限制视场(FOV)的侧叶。光学本征模法为确定最佳光瞳函数提供了一种强有力的方法。我们利用双显示空间光调制器对中央叶的大小、强度与视场的关系进行了全面的研究。实验结果与理论预测和数值模拟结果吻合较好。利用优化的亚衍射焦斑进行类共焦扫描成像，实验证明了成像系统两点分辨率的提高。
Pupil filters have the capability to arbitrarily narrow the central lobe of a focal spot. We decompose the focal field of a confocal-like imaging system into optical eigenmodes to determine optimized pupil functions, that deliver superresolving scanning spots. As a consequence of this process, intensity is redistributed from the central lobe into side lobes restricting the field of view (FOV). The optical eigenmode method offers a powerful way to determine optimized pupil functions. We carry out a comprehensive study to investigate the relationship between the size of the central lobe, its intensity, and the FOV with the use of a dual display spatial light modulator. The experiments show good agreement with theoretical predictions and numerical simulations. Utilizing an optimized sub-diffraction focal spot for confocal-like scanning imaging, we experimentally demonstrate an improvement of the two-point resolution of the imaging system.