# Design of Parabolic Off-Axis Reflector Optical System for Large Aperture Single Star Simulators
[PERSON]  
1 College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China; [EMAIL_ADDRESS] (T.G. ); [EMAIL_ADDRESS] (G.Z. ); [EMAIL_ADDRESS] (Z.D. ); [EMAIL_ADDRESS] (Q.L. ); [EMAIL_ADDRESS] (Q.L. ); [EMAIL_ADDRESS] (S.C.); [EMAIL_ADDRESS] (J.Z.) [PERSON]  
1 College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China; [EMAIL_ADDRESS] (T.G. ); [EMAIL_ADDRESS] (G.Z. ); [EMAIL_ADDRESS] (Z.D. ); [EMAIL_ADDRESS] (Q.L. ); [EMAIL_ADDRESS] (Q.L. ); [EMAIL_ADDRESS] (S.C.); [EMAIL_ADDRESS] (J.Z.) [PERSON]  
1 College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China; [EMAIL_ADDRESS] (T.G. ); [EMAIL_ADDRESS] (G.Z. ); [EMAIL_ADDRESS] (Z.D. ); [EMAIL_ADDRESS] (Q.L. ); [EMAIL_ADDRESS] (Q.L. ); [EMAIL_ADDRESS] (S.C.); [EMAIL_ADDRESS] (J.Z.) [PERSON]  
1 College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China; [EMAIL_ADDRESS] (T.G. ); zh.guoysimulator's emergence is precisely to achieve the star sensitizer of the performance and function of the ground calibration and testing [10; 11; 12]. The attitude measurement accuracy of the ground-calibrated star sensor is affected by the accuracy of the single star simulator developed in the laboratory for calibration. In order to realize the ground-based calibration and testing of star sensitizers for the detection of limiting stars, the calibration accuracy of the single star simulator, which is the ground calibration equipment, must be high. The optical system of the single star simulator generates simulated stellar images to verify the functional indexes and performance indexes of the star sensitizer, so the optical system of the single star simulator has an essential influence on the calibration accuracy of the single star simulator [13]. Therefore, to realize the high-precision ground calibration of the star sensitizer for detecting limiting stars, the aperture of the optical system of the single star simulator should be large enough, and the image quality should be good enough. In contrast, the current optical system of the single star simulator does not have these advantages simultaneously. Some researchers and scholars have studied the design of the optical system of single star simulators. For example, Changchun University of Science and Technology [14] designed a large aperture off-axis reflective star simulator consisting of an off-axis primary parabolic mirror and a secondary plane mirror in the optical system. The optical system has an aperture of \(\Phi\)300 mm, a focal length of 3000 mm, a spectral range of 500-900 nm, a field of view of 30\({}^{\prime}\), an aberration of 0.0062%, and a wave phase aberration of 0.0716\(\lambda\). Although the system has a large aperture, the wave aberration of the optimized system is significant, and the system imaging quality is not good enough. The Changchun Institute of Optical Precision Machinery and Physics, Chinese Academy of Sciences [15], studied a reflective single star simulator optical system designed using an off-axis parabolic mirror with a plane mirror. The focal length is 1000 mm, the aperture is \(\Phi\)100 mm, the spectral range is 450-800 nm, the field of view is 3\({}^{\prime}\), and the maximum wave aberration of the optical system is 0.0238 \(\lambda\). Although the wave aberration of the optimized system is smaller and the imaging quality is better, the aperture of the system is smaller, and the study lacks relevant theoretical analysis and elaboration. Soochow University [16] designed a single star simulator optical system that adopts an off-axis R-C reflective optical structure. The aperture of the system is \(\Phi\)250 mm, the focal length is more significant than 2500 mm, the spectral range is 400 nm to 800 nm, the maximum system wave aberration RMS is \(\lambda\)/22.7 (0.0441\(\lambda\)), and the maximum aberration value in the system is 0.18%.