Telescopes Alignment Using the Sharpness Function Method Based on Undersampled Images
文献类型：期刊论文
| 作者 | Li, Min1,2,3; Liu, Xin1; Zhang, Ang1,3; Xian, Hao1,3 |
| 刊名 | IEEE Photonics Journal
 |
| 出版日期 | 2019-02-01 |
| 卷号 | 11期号:1 |
| 关键词 | Telescope alignment SPGD algorithm relative RMS errors under-sampled images |
| ISSN号 | 1943-0655 |
| DOI | 10.1109/JPHOT.2019.2895128 |
| 文献子类 | 期刊论文 |
| 英文摘要 | In astronomy, the images are sometimes undersampled. In the previous research works, image reconstructions have to be employed to recover the lost information from a set of undersampled images to achieve a high-resolution image using dithering or drizzle methods, which increase the complexity of alignment processes and make the real-time correction impossible. In this paper, the telescope is aligned by changing the positions of the secondary mirror using sharpness function method combined with the stochastic parallel gradient descent algorithm based on both well-sampled and undersampled images without image reconstructions. To improve the accuracy and robustness of the alignment, a new metric called relative root mean square error is proposed. Both numerical simulations and experiments are implemented, and the alignment precisions are measured by wavefront residual errors using Shack-Hartmann wavefront sensors. The results show that the correction processes can converge stably and quickly whether the images are well-sampled or undersampled. In experiments, the average wavefront error is 0.0595 λ for undersampled images and 0.0548 λ for well-sampled images after the telescope alignment, indicating that the misalignments are well compensated for both well-sampled and undersampled images. © 2009-2012 IEEE. |
| WOS关键词 | ADAPTIVE OPTICS ; PARALLEL ; RECONSTRUCTION ; OPTIMIZATION ; PERFORMANCE ; ALGORITHM ; OBJECT ; BEAM |
| WOS研究方向 | Engineering, Electrical & Electronic ; Optics ; Physics, Applied |
| 语种 | 英语 |
| WOS记录号 | WOS:000458768500001 |
| 出版者 | Institute of Electrical and Electronics Engineers Inc. |
| 源URL | [http://ir.ioe.ac.cn/handle/181551/9702]  |
| 专题 | 光电技术研究所_自适应光学技术研究室（八室） |
| 作者单位 | 1.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China; 2.University of Chinese Academy of Sciences, Beijing; 100049, China 3.Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu; 610209, China; |
| 推荐引用方式 GB/T 7714 | Li, Min,Liu, Xin,Zhang, Ang,et al. Telescopes Alignment Using the Sharpness Function Method Based on Undersampled Images[J]. IEEE Photonics Journal,2019,11(1). |
| APA | Li, Min,Liu, Xin,Zhang, Ang,&Xian, Hao.(2019).Telescopes Alignment Using the Sharpness Function Method Based on Undersampled Images.IEEE Photonics Journal,11(1). |
| MLA | Li, Min,et al."Telescopes Alignment Using the Sharpness Function Method Based on Undersampled Images".IEEE Photonics Journal 11.1(2019). |
入库方式： OAI收割
来源：光电技术研究所
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