基于六边形紧密拼接结构的仿生复眼系统设计

基于仿生复眼的视觉优势，分析了仿生复眼的研究进展，对复眼的成像原理及部分昆虫复眼的结构进行了研究。根据生物复眼的结构形态，设计了六边形紧密拼接形式的曲面微透镜阵列及转像系统。同时，为了防止相邻子眼间的成像光束串扰，设计了单个光阑长度为1.5 mm的光阑阵列，实现了各子眼的单通道成像。根据光瞳衔接原则，对微透镜阵列和转换系统进行组合并优化。整个复眼的口径为8.66 mm，视场角为121°，每个子眼的口径为500 μm，子眼视场角为6°，在90 lp/mm处，复眼系统的MTF值均大于0.3，其RMS半径均小于艾里斑半径，系统成像质量达到设计要求。为满足3D增材制造工艺需求，设计了复眼系统的机械结构。公差分析结果表明，3D增材制造工艺可以满足系统的像质要求。

Design of bionic compound eye system based on hexagonal closely spliced structure

Based on the visual advantages of bionic compound eyes, the research progress of bionic compound eyes was analyzed, and the imaging principle of compound eyes and the structure of some insect compound eyes were studied. According to the structure of the biological compound eye, a hexagonal closely spliced curved micro-lens array and image transfer system were designed. At the same time, in order to prevent the crosstalk of imaging beams between adjacent sub-eyes, an aperture array with a single aperture of 1.5 mm in length was designed to realize single-channel imaging of each sub-eye. According to the principle of pupil connection, the micro lens array and the conversion system were combined and optimized. The diameter of the entire compound eye was 8.66 mm, the field of view was 121°, the diameter of each sub-eye was 500 μm, and the field of view of the sub-eye was 6°. At 90 lp/mm, the MTF value of the compound eye system was greater than 0.3, and the RMS spot radius were less than the radius of the Airy disk, the imaging quality of the system meet the requirements of the design index. In order to met the requirements of 3D additive manufacturing process, the mechanical structure of the compound eye system was designed. The tolerance analysis result shows that the system structure meets the preparation requirements of 3D printing technology.