相位恢复算法在反射层析激光雷达成像中的应用

来源 :ChineseOpticsLetters | 被引量 : 0次 | 上传用户:landingyao
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
We apply phase retrieval method to align projection data for tomographic reconstruction in reflective tomography laser radar imaging. In our experiment, the target is placed on a spin table with an unknown, but fixed, axis. The oscillatory motion of the target in the incident direction of the laser pulse is added at each view to simulate the real satellites random motion. The experimental simulation results demonstrate the effectiveness of this method to improve image reconstruction quality. Future research also includes the development of projection registration based on phase retrieval for targets with more complicated structure.
其他文献
We report the fabrication of widely tunable ridge waveguide distributed Bragg reflector (DBR) lasers with InGaAsP butt-joint as grating material. The shape of the butt–joint interface is found to have significant effect on the properties of the lasers. It
期刊
A novel interrogation system for fiber Bragg grating (FBG) sensors with a tunable fiber Fabry-Perot (FFP) wavelength filter is proposed. The system combines a feedback loop arrangement and micro control unit (MCU), which integrates the closed-loop trackin
We report an advanced Fourier transform spectrometer (FTS) on silicon with significant improvement compared with our previous demonstration in [Nat. Commun.9, 665 (
期刊
Tris-(8-hydroxyquinoline)-aluminum (Alq
淋巴管瘤是血管性肿瘤的一种,幸好并不常见。它究竟是畸形、血管扩张、错构瘤还是良性肿瘤尚未定论。没有准确的发病率记截,但文献报道80%的病变发生在头颈部。至少60%的病变出生时就存在,然而大约90%的病变从3岁开始才明显。这是一种良性的先天性的病变,并要在出生后数周之内进行紧急治疗,如果病变广泛,则有相当高的死亡率。
期刊
实时成像是太赫兹成像技术的发展方向之一。利用美国相干公司生产的CO2抽运的THz激光器, 采用124×124像元的面阵探测器对人民币水印进行了成像实验研究; 实验中所用激光频率为2.5 THz。同时, 采用多幅图像平均等方法提高图像信噪比, 最后采用阈值分割方法实现水印提取。利用此成像装置已获得较清晰的人民币水印实时图像, 通过所用的图像处理方法以使水印更清晰可辨。实验结果表明, 此种成像方式在图像分辨率和成像帧频方面具有很大的优势。
The second and final year of the Erasmus Plus programme ‘Innovative Education and Training in high power laser plasmas’, otherwise known as PowerLaPs, is described. The PowerLaPs programme employs an innovative paradigm in that it is a multi-centre progra
柔性电极具有成本低、重量轻、携带方便和易大面积加工等优点,具有广阔的市场前景。综述了柔性染料敏化太阳能电池(DSSC)电极的各种制备方法,包括水热法、微波辐射法、紫外光辐照法、机械压膜法、沉积法、溅射法和低温烧结等,分析比较了各种方法所得染料敏化太阳能电池的光电效率。介绍了柔性电极的最新研究进展以及进一步发展方向。
Cylindrical vector beams are described by the representation formalism of finite electromagnetic beams in free space. This is achieved by factorizing the field vector into a mapping matrix and a Jones-like vector. The vectorial property of a finite beam c