Large dynamic range Shack–Hartmann wavefront measurement based on image segmentation and a neighbouring-region search algorithm
文献类型：期刊论文
| 作者 | Gao, Zeyu1,2,3; Li, Xinyang2,3; Ye, Hongwei2,3 |
| 刊名 | Optics Communications
 |
| 出版日期 | 2019-11-01 |
| 卷号 | 450页码:190-201 |
| 关键词 | Shack-Hartmann wavefront sensor Dynamic range Wavefront measurement Centroiding methods Image segmentation Search algorithm |
| ISSN号 | 0030-4018 |
| DOI | 10.1016/j.optcom.2019.05.045 |
| 文献子类 | 期刊论文 |
| 英文摘要 | The Shack–Hartmann wavefront sensor (SHWFS) has been used to measure wavefronts. However, the dynamic range and measurement accuracy limits the application of the SHWFS. A new centroid estimation algorithm based on image segmentation and related techniques to expand the dynamic range based on search strategy is presented in this paper. In this study, each spot is segmented from a spot array image and the centroid of each spot is calculated only in regions of segmented spots. To compute the slope between the spot centroid and the sub-aperture centre, the calculated centroids are assigned to their corresponding sub-apertures using a search method. The proposed method overcomes the limitations that the centroid must be calculated in its corresponding detection area and reduces the measurement errors caused by noise, expanding the dynamic range significantly without any change to the SHWFS setup as well as improving the measurement accuracy under strong noise. Moreover, the proposed method provides a unit linear coefficient response of centroid estimation. The dynamic range for the proposed method is evaluated by numerical simulations and experiments. Applications include measurement accuracy and linearity. © 2019 |
| WOS关键词 | CENTROID COMPUTATION ; SENSOR ; RECONSTRUCTION ; EXPANSION ; EXTEND |
| WOS研究方向 | Optics |
| 语种 | 英语 |
| WOS记录号 | WOS:000477076200029 |
| 出版者 | Elsevier B.V. |
| 源URL | [http://ir.ioe.ac.cn/handle/181551/9763]  |
| 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.University of Chinese Academy of Sciences, Beijing; 100049, China 2.Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu, Sichuan; 610209, China; 3.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, Sichuan; 610209, China; |
| 推荐引用方式 GB/T 7714 | Gao, Zeyu,Li, Xinyang,Ye, Hongwei. Large dynamic range Shack–Hartmann wavefront measurement based on image segmentation and a neighbouring-region search algorithm[J]. Optics Communications,2019,450:190-201. |
| APA | Gao, Zeyu,Li, Xinyang,&Ye, Hongwei.(2019).Large dynamic range Shack–Hartmann wavefront measurement based on image segmentation and a neighbouring-region search algorithm.Optics Communications,450,190-201. |
| MLA | Gao, Zeyu,et al."Large dynamic range Shack–Hartmann wavefront measurement based on image segmentation and a neighbouring-region search algorithm".Optics Communications 450(2019):190-201. |
入库方式： OAI收割
来源：光电技术研究所
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