Super-resolution pupil filtering for visual performance enhancement using adaptive optics |
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| Authors: | Lina Zhao Junlei Zhao Xiaojun Zhou |
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| Affiliation: | 1. The Key Laboratory on Adaptive Optics, Chinese Academy of Science, Chengdu, China;2. School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, China;3. College of Control Engineering, Chengdu University of Information Technology, Chengdu, China;4. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, China;5. College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, China;6. School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, China |
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| Abstract: | Ocular aberration correction can significantly improve visual function of the human eye. However, even under ideal aberration correction conditions, pupil diffraction restricts the resolution of retinal images. Pupil filtering is a simple super-resolution (SR) method that can overcome this diffraction barrier. In this study, a 145-element piezoelectric deformable mirror was used as a pupil phase filter because of its programmability and high fitting accuracy. Continuous phase-only filters were designed based on Zernike polynomial series and fitted through closed-loop adaptive optics. SR results were validated using double-pass point spread function images. Contrast sensitivity was further assessed to verify the SR effect on visual function. An F-test was conducted for nested models to statistically compare different CSFs. These results indicated CSFs for the proposed SR filter were significantly higher than the diffraction correction (p < 0.05). As such, the proposed filter design could provide useful guidance for supernormal vision optical correction of the human eye. |
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| Keywords: | Super-resolution vision contrast sensitivity optical effects on vision |
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