A Secondary Mirror Alignment Method for Segmented Telescopes Using a Wavefront Sensor-Less Method

被引：1
|
作者：
Li, Min [1 ]
Liu, Xin [2 ]
Zhang, Ang [2 ]
Zhang, Junbo [1 ]
Xian, Hao [1 ]
机构：
[1] Chinese Acad Sci, Inst Opt & Elect, Natl Lab Adapt Opt, Chengdu 610209, Sichuan, Peoples R China
[2] Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Sichuan, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2024年 / 36卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Secondary mirror alignment; large apertures; segmented telescopes; wavefont sensor-less method; stochastic parallel gradient descent (SPGD) algorithm; ADAPTIVE OPTICS; SYSTEM;
D O I：
10.1109/LPT.2024.3363210
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The precise secondary mirror alignment is a key factor to ensure the imaging quality of a segmented telescope with a high resolution demand. In this letter, a two-step alignment method using an improved stochastic parallel gradient descent (SPGD) algorithm called Nadam SPGD algorithm is proposed. Simulation results show that our method can distinguish aberrations caused by phase errors of the primary mirror and position errors of the secondary mirror precisely, and align the secondary mirror quickly and accurately. The improved SPGD algorithm can enhance the correction efficiency by more than two times compared with the traditional SPGD algorithm.
引用
收藏
页码：453 / 456
页数：4
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