Gundu Phanindra, Hack Erwin, Rastogi Pramod
Opt Express. 2005 Apr 18;13(8):2835-42. doi: 10.1364/opex.13.002835.
A comparative study of pupil filters for transverse superresolution is presented in this article. We propose to combine the advantages of amplitude and phase filters in one complex filter that performs better than either phase or amplitude filters designed so far. The performance here refers to having a smaller spot size along with higher peak to side lobe intensity ratio. Using numerical simulation the limitations of phase and amplitude filters are assessed. The experimental verification of the designed combination filter is performed with two LCD spatial light modulators used for displaying separately the phase and amplitude part of the filter. Results obtained from this setup confirm the simulation.
本文介绍了用于横向超分辨率的光瞳滤波器的比较研究。我们建议将幅度滤波器和相位滤波器的优点结合在一个复数滤波器中，该滤波器的性能优于迄今为止设计的相位滤波器或幅度滤波器。这里的性能是指具有更小的光斑尺寸以及更高的峰旁瓣强度比。通过数值模拟评估了相位滤波器和幅度滤波器的局限性。使用两个用于分别显示滤波器相位部分和幅度部分的液晶空间光调制器对设计的组合滤波器进行了实验验证。从该装置获得的结果证实了模拟结果。
