Desensitization Design Method for Freeform TMA Optical Systems Based on Initial Structure Screening

Achieving aberration correction can improve the imaging quality of an optical system, and reducing error sensitivity system realizability system. In order to obtain off-axis three-mirror with high image low sensitivity, a design method is proposed which obtains initial structure anastigmatic (TMA) through nondominated sorting genetic algorithm II (NSGA-II). Combining comprehensive evaluation function this iteratively selects multiple freeform surface types determine combination lowest TMA optimal overall performance. A designed by in paper, analyzed. The results show that effectively improved reduced same applied, verifies correctness practicality method.