Author Affiliations
Abstract
1 Key Laboratory of Multifunctional Materials and Structures, Ministry of Education, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2 Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
3 Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Ministry of Education, Department of Applied Physics, Xi’an Jiaotong University, Xi’an 710049, China
A new architecture, naked-eye ghost imaging via photoelectric feedback, is developed that avoids computer algorithm processing. Instead, the proposed scheme uses a photoelectric feedback loop to first realize the correlation (multiplication) process of the traditional ghost imaging system. Then, the vision persistence effect of the naked eye is exploited to implement the integral process and to generate negative images. Two kinds of feedback circuits, the digital circuit and the analog circuit, are presented that can achieve a feedback operation. Based on this design, high-contrast real-time imaging of moving objects is obtained via a special pattern-scanning architecture on a low-speed light-modulation mask.
ghost imaging naked-eye photoelectric feedback Chinese Optics Letters
2020, 18(9): 091101
为了测量光学成像系统的径向畸变, 采用载频条纹模板, 应用瞬时频率积分法提取因径向畸变而产生的径向调制相位; 推导了条纹径向调制相位与瞬时频率的关系式, 并导出径向调制相位和径向畸变位移关系; 采用小波频率估计提取畸变条纹径向瞬时频率, 并对其进行积分获得畸变条纹的径向调制相位; 应用径向调制相位和立方卷积插值算法对畸变图像进行了校正,得出了详细的理论分析和实验结果。结果表明, 上述方法是可行的。
测量与计量 畸变测量 载频条纹 相位解调 径向畸变 measurement and metrology distortion measurement carrier frequency fringe pattern phase demodulation radial distortion
