针对可见光通信环境的复杂多样性以及传统光学接收天线应用的局限性，设计了一种可变焦光学天线作为移动可见光通信系统的接收天线。通过引入直角反射棱镜折叠空间光路的方法减小天线的厚度，且该天线各透镜面型均为球面，较大地节约了系统成本。仿真分析结果显示：系统的变倍比为2.5倍，视场角可以在16°~42°之间连续变化，最大增益可达16.2，系统尺寸为18 mm×6 mm，探测面照度均匀且相对照度较高，满足通信应用。最后，在5 m × 5 m × 3 m 的通信环境中对变焦天线和定焦天线在不同应用场景下的接收性能进行了对比分析。分析结果表明，变焦光学接收天线满足大视场高增益要求的同时，在系统的稳定性、移动性和环境适用性方面明显优于定焦光学天线，非常适于可见光通信应用。

As the problem of the complex optical communication environment and the boundedness of the traditional optical antenna, an optical zoom antenna is designed for mobile visible light communication.The thickness of the antenna is reduced by using right-angle reflecting prism folding the space optical path. The surface type of each lens in the antenna is spherical, which can save the system cost. The simulation results indicate that the zoom ratio of the system is 2.5; the field of view (FOV) can change between 16° and 42°; the system gain is 16.2; the system size is 18 mm×6 mm. The image quality of the system is well and the relative illumination is high, basically satisfying the communication application. At last, an indoor visible light communication system model is set up in a room with a size of 5 m×5 m×3 m, and the comparation of the detection results between the zoom antenna and the fixed-focus antenna in different situations is analyzed. The simulation results indicate that the optical zoom antenna can satisfy the requirement of large field of view and high gain, improve the system stability, mobility and environmental suitability, and be suitable for visible light communication.