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30 June 2018 Aberration correction of Fresnel zone lenses telescope based on adaptive optics system
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Fresnel zone lens (FZL) telescope is attracting increasing attention owing to its small volume and light weight. However, depending on the fabrication method of FZL, the linewidth and etch depth of FZL may deviate from the set value. It must be considered that the performance of the FZL is influenced by aberrations generated during manufacture. We simulate the effect of fabrication errors on optical performance of FZL and find that the linewidth error of FZL structure is the main cause of image degradation. In addition, we provide a method for correcting aberrations of FZL telescope with adaptive optics system (AOS). This method is verified by the experimental system. The results show that the image resolution is successfully improved after AO correction. The full-width, half-maximum value of a far-field image is improved from 0.065 to 0.038λ. The peak value of image energy after correction has increased by 4.23 times.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2018/$25.00 © 2018 SPIE
Qingfeng Kong, Shuai Wang, Ping Yang, Guomao Tang, Wei Yang, Xin Yu, Boqing Pang, Kangjian Yang, Yong Liu, and Bing Xu "Aberration correction of Fresnel zone lenses telescope based on adaptive optics system," Optical Engineering 57(6), 063107 (30 June 2018).
Received: 28 March 2018; Accepted: 12 June 2018; Published: 30 June 2018

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