The factors which result in pulse stretch in free-space optical communication are analyzed,including atmospheric dispersion,atmospheric turbulence influence and optical system influence.
针对自由空间光通信系统,分析了大气色散、大气湍流以及光学系统对光脉冲信号展宽的影响。
Atmospheric refraction and atmospheric chromatic dispersion values were calculated through numerical iteration based on the segmented linear model of vertical atmospheric temperature profile.
研究结果表明:对于波长范围较大的多波长激光通信系统,需要考虑大气色散引起的对准误差。
So based on the dichromatic atmospheric scattering model, chromatic image defogging was implemented effectively through contrast enhancement.
在二色大气散射模型的基础上,根据雾对景物退化与景物深度的指数关系,采用交互方式,通过附加一些主观判断作为先验信息,从单幅图像中估计出景物深度,进行对比度增强,有效实现了彩色图像去雾。
A wavelength tunable mode-locked fiber ring laser is described, in which a chirped fiber Bragg grating (CFBG) is included to give a large dispersion in the cavity.
利用啁啾光纤光栅的大色散特性 ,通过调节调制频率 ,实现波长调谐 ,调谐范围 2nm。
Based on atmospheric scattering theory,color science,atmospheric environmental monitoring and urban air quality daily reports and other related principles,the negative correlation between air bule saturation and urban air quality level was proved with the theoretical analysis and empirical research.
以大气散射理论为基础,结合颜色学、大气环境监测及城市空气质量日报等相关原理,从理论分析与实证研究2个方面证实了天空蓝色饱和程度与城市空气质量等级之间存在着显著的负相关性,即:天空蓝色饱和程度越低,空气污染等级越高,空气质量状况越差;天空蓝色饱和程度越高,空气污染等级较低,空气质量状况越好;通过相关及回归分析与检验,制得“城市空气质量等级目测色卡”,适用于晴朗天气肉眼观察天空颜色,进而目测估计空气质量等级状况,以采取必要防护措施。
According to the transmission model,atmospheric transmission attenuation,atmospheric scattering attenuation and inverse ration of square distance attenuation are the three main factors leading to the power attenuation with the distance increase.
模型表明:大气传输中的两次斜向传输引入的大气透射比衰减,大气散射衰减和距离平方反比衰减是导致接收光功率随距离增加迅速衰减的主要因素。
It is necessary to detect the atmospheric scattering laser in some situation.
得到激光大气散射辐照度随离轴距离的增大近似按反比规律缓慢下降、能见度仅影响散射强度的大小而不影响散射强度的分布等特征。
Atmospheric Scattering Model of 1.06 μm Laser
1.06μm激光大气散射模型研究
Visual Simulation of Atmospheric Scattering on Earth Based on GPU
基于GPU的地球大气散射现象可视化仿真
Research on atmosphere-scattering influence on laser-angle-cheating jam
大气散射对激光角度欺骗干扰影响的研究
Research on Real-time Rendering of Planet’s Atmospheric Scattering Effects based on GPU
基于GPU的行星大气散射效果实时渲染技术研究
Top-of-atmosphere Angular Distribution of ScatteringEstimation from Aerosol Optical ThicknessMeasurements Over Amoy Sea Area
基于实测的大气参数计算厦门海域大气层顶大气散射辐射的角度分布
absorption and scattering of stellar atmosphere
恒星大气的吸收和散射
Simulation on Atmospheric Volume Emission from Limb Scattering;
基于Limb散射的大气体发射观测模拟
Research on the Property of Light Spectrum Propagation and Scattering in Atmosphere and its Applocation;
大气光谱辐射传输与散射特性及应用
Study on Wave Propagation and Scattering Characteristics of Atmospheric Discrete Random Media;
大气中离散随机介质的波传播和散射特性研究
Research on the Problems of Waves Propagation and Scattering in the Atmospheric Turbulence;
湍流大气中的波传播及散射问题研究
Research and Application of Characteristics for Atmospheric Laser Backscattering;
大气激光后向散射特性的研究和应用
Study on Atmospheric Trace Gas Measurements Using Zenith-sky Scattered Light-DOAS Technique;
利用天顶散射光-DOAS方法测量大气痕量气体研究
Lidar Detection of Aerosol in Suzhou Based on Mie Scattering;
基于Mie散射苏州大气气溶胶的激光雷达探测
The phenomenon of twilight is a consequence of the scattering of the light in the atmosphere.
晨昏蒙影现象是光在大气中散射的结果。
Analysis on Scattering Characteristics of Atmospheric Particles Basing on Near-Infrared Band;
基于近红外波段的大气粒子散射特性研究
Research on Light Scattering of Random Clusters and Propagation, Detection of Laser in Atmosphere
随机簇团光散射及激光大气传输、探测研究
Study on Extinction Characteristics Based on Mie Lidar
米散射激光雷达探测大气消光特性研究
Analysis and Treatment in Atmosphere Back-Scattering of Active Imaging System
主动成像系统中大气后向散射的分析和处理