Sun Houpeng, Li Yingchun, Guo Huichao, Luan Chenglong, Zhang Laixian, Zheng Haijing, Fan Youchen
Graduate School, Space Engineering University, Beijing 101416, China.
Space Engineering University, Beijing 101416, China.
Micromachines (Basel). 2024 Aug 11;15(8):1023. doi: 10.3390/mi15081023.
A method for enhancing the resolution of 3D imaging reconstruction by employing the polarization modulation of electro-optical crystals is proposed. This technique utilizes two polarizers oriented perpendicular to each other along with an electro-optical modulation crystal to achieve high repetition frequency and narrow pulse width gating. By varying the modulation time series of the electro-optical crystal, three-dimensional gray images of the laser at different distances are acquired, and the three-dimensional information of the target is reconstructed using the range energy recovery algorithm. This 3D imaging system can be implemented with large area detectors, independent of the an Intensified Charge-Coupled Device (ICCD) manufacturing process, resulting in improved lateral resolution. Experimental results demonstrate that when imaging a target at the distance of 20 m, the lateral resolution within the region of interest is 2560 × 2160, with a root mean square error of 3.2 cm.
提出了一种通过利用电光晶体的偏振调制来提高三维成像重建分辨率的方法。该技术利用两个相互垂直取向的偏振器以及一个电光调制晶体来实现高重复频率和窄脉冲宽度选通。通过改变电光晶体的调制时间序列，获取不同距离处激光的三维灰度图像，并使用距离能量恢复算法重建目标的三维信息。这种三维成像系统可以用大面积探测器实现，独立于增强型电荷耦合器件（ICCD）制造工艺，从而提高横向分辨率。实验结果表明，当对距离为20 m的目标进行成像时，感兴趣区域内的横向分辨率为2560×2160，均方根误差为3.2 cm。
