光束角

专利二次反射照明，120度LED光束角；

Patented Quadric lighting reflection , 120 degrees LED beam angle ;

怎么定义色温和光束角？

Question : How to define the color temperature and beam angle ?

入射光的光束角必须小于AOTF的角孔径要求；

The incidence angle must be smaller than the aperture of AOTF .

研究发现，光束角移随着折射率及损耗的减小而增大；

It is found that the divergence angular shift increases with decrease of the refractive index and loss .

由光束角限定的立体角内辐射出的光通量与裸光源光通量之比。

The ratio of the flux emitted within the solid angle defined by the beam spread , to the bare lamp flux .

精确测量YAG激光1.06μm光束发散角的一种方法

A method for accuracy measuring 1 06 μ m YAG laser divergence

最后一章，研究了LED与光纤的耦合问题，提出了几种关于改善LED光束发散角和提高LED与光纤耦合效率的方法。

It puts forward some methods to improve beam divergence angle of LED and the coupling efficiency between LED and optical fiber .

基于Delphi的高斯光束发散角测量数据实时处理软件开发

Real-time Data Processing Software Development in Measuring the Divergence Angle of Gaussian Beam Based on Delphi

测量He－Ne激光3.39μm光束发散角的偏光干涉法

Methods and Apparatus of Polarization Light Interference for Measuring He-Ne 3.39 μ m Laser Beam Divergence

为了满足大功率半导体激光束在照明领域的应用要求，经常需要对LD光束发散角进行变换。

In order to make the high power laser beam meet the illumination requirement , the beam divergence always need to be changed .

研究结果表明，涡旋光束经过角向分布狭缝后的干涉图形将随着狭缝数目N以及涡旋光束的拓扑电荷数l的改变而变化。

It is shown that , the interference pattern depends on the number of the angular slit and the topological charge of vortex beams .

本文提出的激光隧道断面放样方法，包括平移物镜扫描，光束发散角的压缩，扫描光点的计算机数字控制（CNC），光电零位恢复装置，及仪器精确定位方法。

The laser lofting technique includes objective scanning , decreasing the beam divergence angle , computer numerical control ( CNC ) of scanning , optoelectronic resetting of zero and precise orientation of instrument .

我们使用光功率计测量激光的脉冲功率，使用CCD成像法对光束发散角进行测量，使用光谱仪获得激光器的光谱特性。

Practically , we use optical meter to test the power of the laser pulse , acquire the spectrum of the laser with spectrum instrument , use CCD method to test the divergence angle .

证明了望远镜型共焦非稳谐振腔是压缩OPO光束发散角的有效方法。

The Cassegrainian unstable resonator has been demonstrated to be one of efficient means to decrease the OPO beam divergence .

介绍了已研制的基于Fabry-Perot标准具直接探测多普勒激光雷达的风速测量原理，讨论了接收光路光束发散角对测风激光雷达系统测量精度的影响。

The principle of wind measurement for a direct detection Doppler wind lidar developed with a Fabry-Perot etalon is described . The measurement error of the system is affected by the receiving beam divergence angle .

在20km处对激光光束发散角采用叠加积分衍射分析进行计算，得到结果为2×10－4mrad，远小于原来的2mrad。

The result for the angle of diffraction in the distance 20km with the accumulating diffractive analysis is 2 × 10 - 4 mrad far below 2 mrad .

非相干合成的ChG列阵光束的角扩展与相对子光束间距和光束数目无关。

The angular spread of ChG array beams for the incoherent combination is independent of the relative separation distance of beams and the beam number . 2 .

结果表明，随着OPO腔长的增加，单脉冲输出能量、光束发散角减少，而脉冲宽度增加。

The result indicates that the single pulse energy and the angle of divergence of output laser decrease , but the pulse width of output laser increases with the increase of the OPO cavity length .

根据理论分析的结果，设计可调谐谐振腔，获得了最大可调谐输出能量77.3mJ，波长可调谐范围650～1039nm，光束发散角约为1mrad的TEM00模激光输出。

According to the theoretical results a laser resonator was designed for our experiment , from which emitting of the fundamental mode with a maximum output energy of 77.3 mJ , tuning range of 650 ~ 1039 um and the divergence of about 1 mrad have been obtained .

将渐变反射率镜（VRM）虚共焦非稳腔成功地应用于光参量振荡器（OPO），在工作重复频率20Hz时，获得了能量40mJ，光束发散角4mrad的157μm激光输出。

An output pulse energy of 40 mJ , repetition rate of 20 Hz at 1.57 μ m with the beam divergence of 4 mrad was obtained in an OPO by using VRM unstable resonator .

结合和频转换效率方程，模拟计算了单／双LBO晶体和频过程的最佳光子数配比、基频光光束发散角、LBO晶体中走离角对LBO晶体长度以及和频转换效率的影响。

Conversion efficiency equations of sum-frequency were combined , the relationship between single / double LBO optimal photon number ratio , fundamental laser beam divergence and walk-off angle with optimal crystal length and sum-frequency conversion efficiency were simulated in the process of sum-frequency .

此外，相干合成的ChG列阵光束的角扩展随离心参数，束腰宽度和相对子光束间距的变化均出现振荡，但湍流中的振荡减弱。

In addition , The angular spread of ChG array beams for the coherent combination exists oscillatory behavior with the changes of the decentered parameter , the waist width and the relative separation distance of beams . However , the oscillatory behavior becomes weaker in turbulence .

并测得输出激光脉冲宽度为160μs，光谱线宽略小于0.8nm，光束发散角为16mrad。

Besides , the pulse width of the beam was detected to be 160 μ s , the line width was less than 0.8 nm , and the beam divergence angle was 16 mrad .

测量激光光束扩散角的一种新方法

A new method measuring the diffusive angle of the laser beam

近轴圆对称光束的角动量及其应用

Angular Momentums of Paraxial and Cylindrical Symmetric Beams and Their Applications

光束截面角动量的轴向分量是守恒量

The Axial Component of Beam Cross - section Angular Momentum is Conserved

激光窗口热效应对光束发散角的影响

Thermal effect of laser windows on the beam divergent angle

针对光束发散角的测量，文中专门进行了详细讨论。

About divergence angle , the paper discusses the testing method specially .

一种基于捕获跟踪策略的光束发散角分析方法

Analytical method for beam divergence angle based on acquisition and tracking strategy

最后分析了最佳的光束发散角，并对概率密度分布规律和跟踪中断概率随衰落冗余变化的规律进行了模拟分析。

Finally , the total probability density function and lost-tracking probability are simulated .