Acta Optica Sinica, Volume. 36, Issue 5, 511001(2016)
Selection of Benchmark Sub-Mirror of Sparse Aperture Based on Phase Diversity
The principle of phase diversity(PD) is firstly introduced. The effect of the benchmark sub-mirror of sparse aperture imaging system on PD is illustrated. Taking Golay3 sparse aperture as an example, the object is imaged by each sub-mirror of the imaging system. The arithmetic mean standard deviation(AMSD) between images of each sub-mirror and the original object is calculated, and the sub-mirror with minimum AMSD value is selected as the benchmark sub-mirror. The influence of errors of the benchmark sub-mirror which are unknown practically on the accuracy of error estimation of the other sub-mirrors is analyzed. The impact of the defocus amount on the results of PD is also discussed. It is shown that the benchmark sub-mirror must be confirmed before error estimation of the other sub-mirrors of the sparse aperture imaging system with PD. The smaller the AMSD value is, the smaller the error of the corresponding sub-mirror is, the smaller the error of the residual sub-mirrors in the system calculated by PD method is, while the variation of the defocus amount has little influence on PD results.
Get Citation
Copy Citation Text
Fan Junliu, Wu Quanying, Li Xunwu, Chen Baohua, Jiang Hui, Lu Zhiyi. Selection of Benchmark Sub-Mirror of Sparse Aperture Based on Phase Diversity[J]. Acta Optica Sinica, 2016, 36(5): 511001
Category: Imaging Systems
Received: Dec. 23, 2015
Accepted: --
Published Online: May. 3, 2016
The Author Email: Junliu Fan (fjl280@163.com)