Distance-Power Index Weighted Centroid Detection Algorithm for Shack-Hartmann Wavefront Sensors

Rui Ge; Wen Shen; Chao Liu; Zhouping Su; Huaxin Zhu; Dayu Li; Xinghai Lu; Quanquan Mu; Zhaoliang Cao; Li Xuan; Lifa Hu

doi:10.3788/LOP55.040401

Laser & Optoelectronics Progress, Volume. 55, Issue 4, 040401(2018)

Distance-Power Index Weighted Centroid Detection Algorithm for Shack-Hartmann Wavefront Sensors

Rui Ge¹, Wen Shen¹, Chao Liu¹, Zhouping Su¹, Huaxin Zhu¹, Dayu Li¹, Xinghai Lu¹, Quanquan Mu¹, Zhaoliang Cao¹, Li Xuan¹, and Lifa Hu¹

Author Affiliations

¹ Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, School of Science, Jiangnan University, Wuxi, Jiangsu 214122, China

¹ State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China

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Fig. 1. Simulated light spot and its image on CCD. (a) Original light spot; (b) light spot without noise; (c) light spot with noise

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Fig. 2. Calculation error of each algorithm under different cases. (a) Variation of calculation error with SNR; (b) variation of calculation error with the moving distance of light spot; (c) variation of calculation error with CCD sampling frequency; (d) variation of calculation error with spot size

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Table 1. Average error of each algorithm under different variablespixel
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Table 1. Average error of each algorithm under different variablespixel
Algorithm Variable
SNR Moving distance CCD sampling frequency Spot size
ATCG 6.2830 6.7298 2.2046 3.2447
GCG 3.8337 4.9326 1.3469 2.0478
PCG 6.0810 6.5736 2.1522 3.2113
DPCG 1.0155 1.3818 0.3588 0.7205

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Rui Ge, Wen Shen, Chao Liu, Zhouping Su, Huaxin Zhu, Dayu Li, Xinghai Lu, Quanquan Mu, Zhaoliang Cao, Li Xuan, Lifa Hu. Distance-Power Index Weighted Centroid Detection Algorithm for Shack-Hartmann Wavefront Sensors[J]. Laser & Optoelectronics Progress, 2018, 55(4): 040401

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