Wavefront reconstruction algorithm for wavefront sensing based on binary aberration modes
We propose a new algorithm for wavefront sensing based on binary intensity modulation. The algorithm is based on the fact that a wavefront can be expended with a series of orthogonal and binary functions, the Walsh series. We use a spatial light modulator（SLM） to produce different binary-intensity-m...
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| Published in | Chinese physics B Vol. 26; no. 5; pp. 153 - 159 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.05.2017
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 |
| DOI | 10.1088/1674-1056/26/5/054204 |
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| Summary: | We propose a new algorithm for wavefront sensing based on binary intensity modulation. The algorithm is based on the fact that a wavefront can be expended with a series of orthogonal and binary functions, the Walsh series. We use a spatial light modulator（SLM） to produce different binary-intensity-modulation patterns which are the simple linear transformation of the Walsh series. The optical fields under different binary-intensity-modulation patterns are detected with a photodiode.The relationships between the incident wavefront modulated with the patterns and their optical fields are built to determinate the coefficients of the Walsh series. More detailed and strict relationship equations are established with the algorithm by adding new modulation patterns according to the properties of the Walsh functions. An exact value can be acquired by solving the equations. Finally, with the help of phase unwrapping and smoothing, the wavefront can be reconstructed. The advantage of the algorithm is providing an analytical solution for the coefficients of the Walsh series to reconstruct the wavefront. The simulation experiments are presented and the effectiveness of the algorithm is demonstrated. |
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| Bibliography: | Boqing Pang1,2,3, Shuai Wang1,3, Tao Cheng1,2,3, Qingfeng Kong1,2,3,4, Lianghua Wen1,2,3,5, Ping Yang1,3（1 Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China ; 2 University of Chinese Academy of Sciences, Beijing 100049, China; 3 The Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China;4 School of Optoelectronic information, University of Electronic Science and Technology of China, Chengdu 610209, China; 5 School of Physics and Electronic Engineering, Yibin University, Yibin 644000, China） We propose a new algorithm for wavefront sensing based on binary intensity modulation. The algorithm is based on the fact that a wavefront can be expended with a series of orthogonal and binary functions, the Walsh series. We use a spatial light modulator（SLM） to produce different binary-intensity-modulation patterns which are the simple linear transformation of the Walsh series. The optical fields under different binary-intensity-modulation patterns are detected with a photodiode.The relationships between the incident wavefront modulated with the patterns and their optical fields are built to determinate the coefficients of the Walsh series. More detailed and strict relationship equations are established with the algorithm by adding new modulation patterns according to the properties of the Walsh functions. An exact value can be acquired by solving the equations. Finally, with the help of phase unwrapping and smoothing, the wavefront can be reconstructed. The advantage of the algorithm is providing an analytical solution for the coefficients of the Walsh series to reconstruct the wavefront. The simulation experiments are presented and the effectiveness of the algorithm is demonstrated. 11-5639/O4 wavefront aberration Walsh modulated reconstructed optics incident smoothing Zernike modulator |
| ISSN: | 1674-1056 2058-3834 |
| DOI: | 10.1088/1674-1056/26/5/054204 |