Huang Yi-Fan, Xing Yang-Guang, Shen Wen-Jie, Peng Ji-Long, Dai Shu-Wu, Wang Ying, Duan Zi-Wen, Yan Lei, Liu Yue, Li Lin. Optical design of sub-angular second spatially resolved solar extreme ultraviolet broadband imaging spectrometerJ. Acta Physica Sinica, 2024, 73(3): 039501. DOI: 10.7498/aps.73.20231481