Pattern characteristics of collimated laser beam in a turbulent atmosphere I.
湍流大气中准直激光束的光斑特征I。
Pattern characteristics of collimated laser beam in a turbulent atmosphere Ⅰ.
饶瑞中。湍流大气中准直激光的光斑特征Ⅰ。
Pattern characteristics of collimated laser beam in a turbulent atmosphere II.
湍流大气中准直激光束的光斑特征II.Strehl比与锐度。
Detail, director Yuan recreates the turbulent atmosphere of the period as
高尚品格。风格上，导演袁牧之更以独立的喜剧手法处
Based on the extended Huygens-Fresnel principle, the Hufnagel-Valley profile model of the turbulence which is dependent on altitude, and the wave structure function under all conditions of atmospheric turbulence, the mutual coherence function of quasi-monochromatic Gaussian Schell-model beams propagating in the slant path through turbulent atmosphere is derived analytically.
由广义惠更斯菲涅耳原理、随高度变化的Hufnagel-Valley湍流廓线模型以及波结构函数在任意湍流条件下的近似表达式，导出了斜程传输时准单色高斯谢尔光束互相干函数的解析式。
In order to understand this phenomenon, four different kind of situations: the diffraction of thin ring, diffraction of double apertures, decomposing the field into the superimposition of different frequencies and the propagation of solid beam with strong turbulent effects, are analyzed and primary explanation are given.
针对这一现象，从薄环光束真空衍射、双孔衍射、将光场分解为不同频率场的叠加和实心束强湍流等四种情况分别进行了讨论，给出了初步的理论分析。标签大气光学光斑碎片统计分析大气湍流 atmospheric optics cracked beam spot statistical analysis turbulent atmosphere
Based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, the theoretical modal of optical intensity distribution on the focal plane for focused hollow vortex beams with a Gaussian background propagating in turbulent atmosphere was investigated and obtained. The effects of atmospheric index structure constant C2n, topological charge, focal length and beam wavelength on optical intensity distribution on the focal plane were analyzed.
运用广义惠更斯-菲涅耳原理和相位结构函数的平方近似，研究了聚焦高斯空心涡旋光束通过湍流大气传输后在焦平面内的光强分布的理论模型，同时分析了不同大气折射率结构常数C2n、聚焦距离、光束拓扑荷和湍流外尺度对焦面光强分布特性的影响。
It is shown by the results measured in the atmosphere that the eddies with temperature sharp Changing section via temperature discontinuous surface may frequently occur in an unstable stratified turbulent medium.
大气中的测量结果表明，不稳定的层结湍流介质中，可能频繁出现带温度突变面的涡漩，由于其结构的不对称性，能够导致介质的某些光传输特性偏离湍流均匀各向同性理论。
Based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, we have derived the analyticl expression of the spatial degree of coherence for partially coherent flattened beams propagating through the slant turbulent atmosphere with the help of tensor integral, then analyzed the effects of different zenith angle, propagation distance, coherence of source and outer scale of turbulence on the spatial degree of coherence on the receiver.
基于广义惠更斯-菲涅耳原理和相位结构函数的平方近似，运用张量积分的方法导出了部分相干平顶光束通过斜程湍流大气传输后接收面光束空间相干度的解析表达式，分析了不同天顶角、传输距离、光源相干性以及湍流外尺度对接收面光束空间相干度的影响。
Based on the theory for the irradiance fluctuations of the spherical wave propagating in the turbulent atmosphere and the annular-aperture filtering function, the expression of annular-aperture averaging factor was obtained.
利用弱起伏条件下球面波在大气湍流中传输的光强起伏理论和圆环孔径滤波函数，获得了圆环孔径平均因子的精确表达式。
A turbulent jet turning transversely into a uniform crossflow is an important type of fluid flow with applications in various engineering fields, e. g. internal film cooling of turbine blades, dilute air jets in combustion chambers, jet from V/STOL aircraft in transition flight, and waste disposal from smoke stacks into the atmosphere.
横向紊动射流作为流体运动的一种重要类型，广泛存在于如：燃气轮机气膜冷却、锅炉燃烧室等的燃烧控制，V/STOL飞机、废气排放的控制等工程实际应用中。
In order to study the effect of different zenith angles, propagation distances, coherence of source and outer scale of turbulence on the spatial coherence on the receiver, based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, the expression of the spatial coherence for partially coherent flat-topped beam propagating through slant turbulent atmosphere was derived with the help of tensor integral.
为了研究不同天顶角、传输距离、光源相干性以及湍流外尺度对接收面光束空间相干度的影响，采用广义惠更斯-菲涅耳原理和相位结构函数的平方近似，并运用张量积分的方法，得到了部分相干平顶光束通过斜程湍流大气传输后接收面光束空间相干度的解析表达式。
Turbulent motion refers to the process by which heat and moisture are transferred from the land or ocean surface to the lower atmosphere.
湍流运动指的是热量和水分从地表或海洋表面转移到低层大气中的过程。
This result implies upward and downward spiral motion of turbulent atmosphere.
而且斜坡结构具有螺旋度，表明斜坡结构中的空气的运动形式可能是一种螺旋下降和螺旋上升的运动。
In strong turbulent atmosphere, the far-field beam quality degrades into the incoherent combining case without any relationship with the fill factor and laser wavelength.
但是在湍流强度较强的情形下，相干合成远场光束质量退化致非相干合成的情形，与激光阵列的紧凑度和激光波长无关。
Arrival Angle of Beam Wave Propagation in Turbulent Atmosphere
湍流大气中束状波的到达角起伏
Aperture Effect of Probability Density Function of Speckle Field of Laser Beam in the Turbulent Atmosphere
激光大气传输光斑统计概率接收孔径效应
The four-dimension program including time were used to simulate incomplete phase conjugation for laser propagation in turbulent atmosphere.
采用含时四维程序数值模拟了激光在湍流大气中传输的不完全相位共轭。
Study on Spectral Properties of Laser Beams Propagating Through Turbulent Atmosphere
激光束通过湍流大气传输的光谱特性研究
A general expression of the scintillation index is proposed for optical wave propagating in turbulent atmosphere under arbitrary fluctuation conditions.
提出了任意起伏条件下湍流大气中光波闪烁方差的通用表达式。