【摘要】 为满足极限星等的探测需求，大口径星敏感器得以迅速发展，然而星敏感器在地面端进行观星测试时受到大气湍流的影响不容忽视。因此，针对星敏感器的需求开展口径为150 mm湍流模拟装置的设计工作。首先，受限于湍流模拟装置液晶尺寸的限制，基于开普勒望远镜的初始结构，采用大倍率扩束的方案，实现大口径湍流的模拟。其次，结合共轭成像的原理，通过构建共轭面的方法，将所模拟的湍流信息映射到瞳面位置处。此外，采用稀疏谱模型的方法对大气湍流进行模拟。最后，搭建实验平台验证设计结果。实验结果表明，光学系统在满足物像共轭、光瞳匹配的条件下得到含有■150 mm的湍流信息的星点光，大气相干长度r₀为1～15 cm。更多还原

【Abstract】 The rapid development of large-aperture star sensors to meet the demand for detecting extreme stars cannot be ignored. However, it is important to consider the impact of atmospheric turbulence on star sensors during stargazing tests conducted on the ground. Therefore, in this paper, the design of a turbulence simulator with an aperture of 150 mm is carried out to meet the needs of a star sensor. Firstly, limited by the liquid crystal size of the turbulence simulation device, based on the initial structure of the Kepler telescope, a large magnification beam expansion scheme is used to achieve the simulation of large aperture turbulence. Second, combined with the principle of conjugate imaging, the simulated turbulence information is mapped to the pupil surface position by constructing a conjugate surface. In addition, the method of sparse spectral model is used to simulate the atmospheric turbulence. Finally, an experimental platform is constructed to verify the design results. The experimental results show that the optical system obtains the output of a star point containing 150 mm of turbulence information under the conditions of conjugate imaging and pupil matching, and the atmospheric coherence length is 1～15 cm.更多还原