作者单位
摘要
长光卫星技术有限公司,吉林长春130000
为了实现吉林一号宽幅01星亚米级宽幅相机影像的高精度几何定位,建立了超多片TDI CCD机械式交错拼接推扫成像系统的严密几何模型,对严密几何模型进行了基于探元指向角模型附带片间几何定位一致性约束的在轨几何定标方法研究及验证。在推扫式光学遥感卫星成像原理基础上建立严密成像几何模型,通过将定标系数分解为内方位元素定标参数与外方位定标参数,并结合大幅宽超多片探测器机械交错拼接相机的成像特点采用附带片间几何定位一致性约束的分步迭代法求解定标系数。最后,利用参考数据进行了在轨几何定标,获得内外定标系数。结果表明:本文的定标方法及定标模型合理有效,能显著提升吉林一号宽幅01星亚米级宽幅相机影像的无控定位精度,内定标精度优于0.3 pixel,实现了超多片TDI CCD机械式拼接无缝拼接影像的生成,多光谱谱段间配准精度优于0.3 pixel,全色影像与多光谱影像具有一致的几何定位精度,无控定位精度优于20 m(CE90),带控定位精度优于2 m,满足1∶10 000的制图需求。
光学遥感 吉林一号宽幅01星 亚米级宽幅相机,严密几何模型 在轨几何定标 定位精度 optical remote sensing Jilin1-KF01A satellite sub-meter resolution wide view camera rigorous geometric model on-orbit geometric calibration positioning accuracy 
光学 精密工程
2021, 29(8): 1769
Yi Jia 1Li Guo 2,*Shilin Hu 3Xinyan Jia 1,**[ ... ]Jing Chen 5,6,***
Author Affiliations
Abstract
1 School of Physics, Southwest Jiaotong University, Chengdu 610031, China
2 Department of Physics, Shanghai Normal University, Shanghai 200234, China
3 Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing & School of Physics and Astronomy, Sun Yat-sen University (Zhuhai Campus), Zhuhai 519082, China
4 Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
5 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
6 Center for Advanced Material Diagnostic Technology, College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, China
We calculate the time-energy distribution (TED) and ionization time distribution (ITD) of photoelectrons emitted by a double-extreme-ultraviolet (XUV) pulse and a two-color XUV-IR pulse using the Wigner distribution-like function based on the strong field approximation. For a double-XUV pulse, besides two identical broad distributions generated by two XUV pulses, many interference fringes resulting from the interference between electrons generated, respectively, by two pulses appear in the TED. After adding an IR field, the TED intuitively exhibits the effect of the IR field on the electron dynamics. The ITDs during two XUV pulses are no longer the same and show the different changes for the different two-color fields, the origin of which is attributed to the change of the electric field induced by the IR field. Our analysis shows that the emission time of electrons ionized during two XUV pulses mainly depends on the electric field of the combined XUV pulse and IR pulse.
Wigner distribution two-color field time-energy distribution attosecond physics strong field approximation 
Chinese Optics Letters
2021, 19(12): 123201
作者单位
摘要
江苏大学 计算机科学与通信工程学院, 江苏 镇江 212013
线性光子晶体中可获得较低的慢光速度是以牺牲带宽为代价的。本文通过在光子晶体圆环型腔内加入克尔型非线性材料, 分别构建以三角晶格和正方晶格排列的非线性环型腔线缺陷波导, 利用有限元法对其慢光特性进行了仿真模拟。结果表明: 正方晶格具有更好的慢光效应, 获得的最佳慢光群速度为0.0055c, 在保证10-3c慢光条件下, 可达到0.001的相对带宽; 与线性光子晶体线缺陷耦合腔波导相比, 带宽提高了两倍, 实现了具有低群速度、高带宽特性的慢光效果, 对进一步发展光子晶体的光缓存有着重要意义。
慢光 非线性光子晶体 环型腔 线缺陷 slow light nonlinear photonic crystal ring-shaped cavity line defect 
光电子技术
2018, 38(1): 55

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!