| Abstract: | We use feedback wavefront shaping technology to realize the multi-point uniform light focusing in three-dimensional(3 D) space through scattering media only by loading the optimal mask once.General 3 D spatial focusing needs to load the optimal mask multiple times to realize the spatial movement of the focal point and the uniformity of multi-point focusing cannot be guaranteed.First,we investigate the effects of speckle axial correlation and different axial distances on 3 D spatial multi-point uniform focusing and propose possible solutions.Then we use our developed non-dominated sorting genetic algorithm suitable for 3 D spatial focusing(S-NSGA) to verify the experiment of multi-point focusing in 3 D space.This research is expected to have potential applications in the fields of optical manipulation and optogenetics. |
