Robust CCD photoelectric autocollimator for outdoor use
A robust charge-coupled device （CCD） photoelectric autocollimator for outdoor use is designed and demonstrated. The influence of outdoor conditions on the signal-to-noise ratio （SNR） and imaging quality of the measuring system is experimentally analyzed. The pulse width modulation technology is appl...
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| Published in: | Chinese optics letters Vol. 9; no. 9; pp. 32 - 36 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
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10-09-2011
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| Abstract | A robust charge-coupled device （CCD） photoelectric autocollimator for outdoor use is designed and demonstrated. The influence of outdoor conditions on the signal-to-noise ratio （SNR） and imaging quality of the measuring system is experimentally analyzed. The pulse width modulation technology is applied to the automatic feedback control of the actively regulated illuminating light source of the measuring system to maximize SNR while avoiding image saturation. A Fourier phase shift method for subpixel estimation is adopted to achieve high-accuracy measurement in the presence of noises. Experimental results indicate that the technologies proposed here largely improve the measuring stability, dynamic range, and accuracy of the CCD photoelectric autocollimator used outdoors. |
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| AbstractList | A robust charge-coupled device （CCD） photoelectric autocollimator for outdoor use is designed and demonstrated. The influence of outdoor conditions on the signal-to-noise ratio （SNR） and imaging quality of the measuring system is experimentally analyzed. The pulse width modulation technology is applied to the automatic feedback control of the actively regulated illuminating light source of the measuring system to maximize SNR while avoiding image saturation. A Fourier phase shift method for subpixel estimation is adopted to achieve high-accuracy measurement in the presence of noises. Experimental results indicate that the technologies proposed here largely improve the measuring stability, dynamic range, and accuracy of the CCD photoelectric autocollimator used outdoors. |
| Author | 高敏 董作人 卞正兰 叶青 方祖捷 瞿荣辉 |
| AuthorAffiliation | Shanghai Key Laboratory of All Solid-state Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China Craduate University of Chinese Academy of Sciences, Beifing 100049, China |
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| DocumentTitleAlternate | Robust CCD photoelectric autocollimator for outdoor use |
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| Notes | 31-1890/O3 A robust charge-coupled device （CCD） photoelectric autocollimator for outdoor use is designed and demonstrated. The influence of outdoor conditions on the signal-to-noise ratio （SNR） and imaging quality of the measuring system is experimentally analyzed. The pulse width modulation technology is applied to the automatic feedback control of the actively regulated illuminating light source of the measuring system to maximize SNR while avoiding image saturation. A Fourier phase shift method for subpixel estimation is adopted to achieve high-accuracy measurement in the presence of noises. Experimental results indicate that the technologies proposed here largely improve the measuring stability, dynamic range, and accuracy of the CCD photoelectric autocollimator used outdoors. Min Gao , Zuoren Dong , Zhenglan Bian, Qing Ye , Zujie Fang , Ronghui Qu （1Shanghai Key Laboratory of All Solid-state Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2 Craduate University of Chinese Academy of Sciences, Beifing 100049, China） |
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| Snippet | A robust charge-coupled device （CCD） photoelectric autocollimator for outdoor use is designed and demonstrated. The influence of outdoor conditions on the... |
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| SubjectTerms | CCD 信号噪声比 光电自准直仪 实验分析 户外使用 测量系统 电荷耦合器件 脉冲宽度调制技术 |
| Title | Robust CCD photoelectric autocollimator for outdoor use |
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