基于介质超表面的超紧凑、大倍率光学变焦透镜研究

变焦系统在成像系统中占有重要的地位。传统光学变焦系统一般存在复杂度高、空间需求大以及集成度低等问题。因此，空间紧凑、集成度高的大倍率光学变焦系统是研究人员一直努力的方向。本项目中，申请团队提出了一种基于双层介质超表面的变焦透镜设计。通过两层相位分布特殊设计的超表面之间的相对旋转，即可实现大于18倍的光学变焦。本项目将基于前期研究结果，围绕介质超表面的波前调控原理与光学特性进行深入研究和分析，开展双层介质超表面大倍率光学变焦透镜的设计、仿真与优化，并在此基础上完成基于介质超表面的超紧凑、大倍率光学变焦透镜原理样片的制备，最后搭建变焦成像系统进行光学特性和成像特性的测试研究。项目的研究和实施，将会对传统光学变焦系统产生革新性影响，并促进其在光学相关领域的应用。

Zoom systems play an important role in imaging systems. The traditional optical zoom system has many problems, such as high complexity, large space demand and low integration. Therefore, the high-power optical zoom system with compact space and high integration has been the direction of researchers. In this project, the application group proposed a zoom lens based on the double-layer dielectric metasurfaces. It has been proved that the optical zoom of more than 18 times can be achieved by the relative rotation between two layers. Based on the previous research results, the project will focus on the principle and optical properties of the wave front control principle and optical characteristics of the dielectric metasurfaces. The design, simulation and optimization of the high-power optical zoom lenses with compact space and high integration are carried out. Based on that, the fabrication of the sample is completed. Finally, the zoom imaging system is built. The optical and imaging characteristics are tested and studied. The research and implementation of the project will have an innovative impact on the traditional optical zoom system and promote the applications in optical fields.