Li Wenxiang, Kang Chao, Guan Hengrui, Huang Shen, Zhao Jinbiao, Zhou Xiaojun, Li Jinpeng
Nanjing Astronomical Instruments Research Center, University of Science and Technology of China, Hefei 230026, China.
CAS Nanjing Astronomical Instruments Co., Ltd., Nanjing 210042, China.
Sensors (Basel). 2020 Nov 9;20(21):6403. doi: 10.3390/s20216403.
The correction of wavefront aberration plays a vital role in active optics. The traditional correction algorithms based on the deformation of the mirror cannot effectively deal with disturbances in the real system. In this study, a new algorithm called deep learning correction algorithm (DLCA) is proposed to compensate for wavefront aberrations and improve the correction capability. The DLCA consists of an actor network and a strategy unit. The actor network is utilized to establish the mapping of active optics systems with disturbances and provide a search basis for the strategy unit, which can increase the search speed; The strategy unit is used to optimize the correction force, which can improve the accuracy of the DLCA. Notably, a heuristic search algorithm is applied to reduce the search time in the strategy unit. The simulation results show that the DLCA can effectively improve correction capability and has good adaptability. Compared with the least square algorithm (LSA), the algorithm we proposed has better performance, indicating that the DLCA is more accurate and can be used in active optics. Moreover, the proposed approach can provide a new idea for further research of active optics.
波前像差的校正在自适应光学中起着至关重要的作用。基于镜面变形的传统校正算法无法有效处理实际系统中的干扰。在本研究中,提出了一种名为深度学习校正算法(DLCA)的新算法来补偿波前像差并提高校正能力。DLCA由一个智能体网络和一个策略单元组成。智能体网络用于建立存在干扰的自适应光学系统的映射,并为策略单元提供搜索基础,可提高搜索速度;策略单元用于优化校正力,可提高DLCA的精度。值得注意的是,应用了一种启发式搜索算法来减少策略单元中的搜索时间。仿真结果表明,DLCA能有效提高校正能力且具有良好的适应性。与最小二乘法(LSA)相比,我们提出的算法具有更好的性能,表明DLCA更精确,可用于自适应光学。此外,所提出的方法可为自适应光学的进一步研究提供新思路。