Design of zoom head-up display optical system based on nodal aberration theory

We propose a zoom dual-path augmented reality head-up display optical system. The system uses two image generation units to display the basic and interactive information. Based on the node aberration theory, the aberration evaluation function was constructed. By solving the optimal solution of the aberration evaluation function, the initial structure of the interactive information display optical path was obtained. In order to solve the vergence-accommodation conflict in the process of vehicle speed change, the interactive information optical path was designed as a zoom optical path. The zoom distance is 10–20 m, and the basic information optical path will not be interfered with in the process. In addition, the tolerance analysis of the system was carried out to prove the machinability and stability of the system. This study makes the imaging of the augmented reality head-up display system more in line with the characteristics of the human eye and improves driving comfort.