基于超像素方法的多点可控波前整形研究  

Multi-point Controllable Wavefront Shaping Based on Superpixel Method

作　　者：赵杨 丁迎春[1] ZHAO Yang;DING Yingchun(College of Mathematics and Physics,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学数理学院,北京100029

出　　处：《光子学报》2021年第9期338-344,共7页Acta Photonica Sinica

基　　金：北京市自然科学基金(No.7182091)。

摘　　要：提出一种用于迭代优化波前整形的新算法,即将混合型非支配排序遗传算法与超像素方法结合,使用数字微镜对光场进行调制,以实现反射式波前整形的多点可控光聚焦。该方法的优势在于:一方面,在提高增强因子的同时保证多个聚焦点强度的均匀性可控,即所有焦点具有均匀的强度;另一方面,反射式波前整形的结构更有利于应用。为验证算法的功能,采用毛玻璃作为散射介质进行实验。实验结果表明,相较于基于超像素的遗传算法的实验,聚焦点的增强因子提高了24.12%,变异系数由13.3%降为4.2%。该研究为反射式波前整形多点光聚焦提供了一种新方法,在光遗传学和光捕获领域有潜在的应用价值。A new algorithm for iterative optimization of wavefront shaping which is the combination of Nondominated Sorting Genetic AlgorithmⅡ-Hybrid and the superpixel method is proposed,using digital micromirror devices for light field modulation.Multi-point controllable light focusing of reflective wavefront shaping is realized.Our method has two advantages.On the one hand,while increasing the enhancement factor,it also ensures that the uniformity of the intensity of multiple focal points is controllable,that is,all focal points have uniform intensity;on the other hand,the structure of reflective wavefront shaping is more conducive to application.In order to verify our algorithm,we use frosted glass as the scattering media in the experiment.The experimental results show that,compared with the genetic algorithm based on superpixel method,the enhancement factor of the focal point is increased by 24.12%,and the coefficient of variation is reduced from 13.3%to 4.2%.This research provides a new method for reflective wavefront shaping multi-point light focusing,and has potential application value in the field of optogenetics and light capture.

关 键 词：波前整形 混合型非支配排序遗传算法 反射式 多点可控 均匀性 

分 类 号：O436.2[机械工程—光学工程]