A Method Used to Improve the Dynamic Range of ShackHartmann Wavefront Sensor in Presence of Large Aberration

doi:10.3390/s22197120

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	A Method Used to Improve the Dynamic Range of ShackHartmann Wavefront Sensor in Presence of Large Aberration
	W. Yang; J. Wang and B. Wang
刊名	Sensors
	2022
卷号	22 期号:19
ISSN号	14248220
DOI	10.3390/s22197120
英文摘要	With the successful application of the ShackHartmann wavefront sensor in measuring aberrations of the human eye, researchers found that, when the aberration is large, the local wavefront distortion is large, and it causes the spot corresponding to the sub-aperture of the microlens to shift out of the corresponding range of the sub-aperture. However, the traditional wavefront reconstruction algorithm searches for the spot within the corresponding range of the sub-aperture of the microlens and reconstructs the wavefront according to the calculated centroid, which leads to wavefront reconstruction errors. To solve the problem of the small dynamic range of the ShackHartmann wavefront sensor, this paper proposes a wavefront reconstruction algorithm based on the autocorrelation method and a neural network. The autocorrelation centroid extraction method was used to calculate the centroid in the entire spot map in order to obtain a centroid map and to reconstruct the wavefront by matching the centroid with the microlens array through the neural network. This method breaks the limitation of the sub-aperture of the microlens. The experimental results show that the algorithm improves the dynamic range of the first 15 terms of the Zernike aberration reconstruction to varying degrees, ranging from 62.86% to 183.87%. 2022 by the authors.
URL标识	查看原文
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/66837]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	W. Yang,J. Wang and B. Wang. A Method Used to Improve the Dynamic Range of ShackHartmann Wavefront Sensor in Presence of Large Aberration[J]. Sensors,2022,22(19).
APA	W. Yang,&J. Wang and B. Wang.(2022).A Method Used to Improve the Dynamic Range of ShackHartmann Wavefront Sensor in Presence of Large Aberration.Sensors,22(19).
MLA	W. Yang,et al."A Method Used to Improve the Dynamic Range of ShackHartmann Wavefront Sensor in Presence of Large Aberration".Sensors 22.19(2022).