Fixler Ohad, Zalevsky Zeev
School of Engineering, Bar Ilan University, Ramat Gan, 52900, Israel.
Appl Opt. 2011 Oct 10;50(29):5662-73. doi: 10.1364/AO.50.005662.
In this paper we introduce an imaging system based on a reflective phase-only spatial light modulator (SLM) in order to perform imaging with improved geometric resolution. By using the SLM, we combine the realization of two main abilities: a lens with a tunable focus and a phase function that, after proper free-space propagation, is projected as an amplitude distribution on top of the inspected object. The first ability is related to the realization of a lens function combined with a tunable prism that yields a microscanning of the inspected object. This by itself improves the spatial sampling density. The second ability is related to a projection of a phase function that is computed using an iterative beam-shaping Gerchberg-Saxton algorithm. After the free-space propagation from the SLM toward the inspected object, an amplitude pattern is generated on top of the object. This projected pattern and a set of low-resolution images with relative shift are interlaced and, after applying the proper regularization method, a geometrically superresolved image is reconstructed.
在本文中，我们介绍了一种基于反射式纯相位空间光调制器（SLM）的成像系统，以便进行具有更高几何分辨率的成像。通过使用SLM，我们实现了两项主要功能：一个具有可调焦距的透镜和一个相位函数，经过适当的自由空间传播后，该相位函数作为振幅分布投射到被检查物体上。第一项功能与实现结合了可调棱镜的透镜功能有关，该功能可对被检查物体进行微扫描。这本身就提高了空间采样密度。第二项功能与使用迭代光束整形格尔奇贝格-萨克斯顿算法计算出的相位函数的投影有关。从SLM向被检查物体进行自由空间传播后，会在物体上生成一个振幅图案。这个投射图案和一组具有相对偏移的低分辨率图像进行交织，并且在应用适当的正则化方法后，重建出几何超分辨图像。
