激光束

He and his colleagues have now made the first such beams.

他和他的同事们现在已经作出了第一个这样的激光束。

In this paper, the introduction is made of laser classification, application, and the special features of laser beams.

本文介绍了激光器的分类和应用，激光束的特性。

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。

On the basis of ray optics, the theoretical expressions of the collimated beam by a DHCL are derived, and the numerical results are also given.

本文以光线光学为基础，对双半圆柱透镜准直半导体激光束问题进行了系统分析并给出了数值模拟结果。

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。

In this paper, we proposed a new method of coupling in terms of the request of the intersatellite optical communication system. Using an aspherical cylindrical lens whose front cylindrical lens is orthonormal to its back cylindrical lens collimates the laser beam, and then is focused by a GRIN lens and couples to the single-mode fiber.

针对星间光通信系统的要求，本文采用一种新型的半导体激光耦合方案，用前后正交的非球面柱面透镜准直半导体激光束，再经渐变折射率自聚焦透镜聚焦耦合入单模光纤。

Because of simple structure and easy fabricating, the cylindrical lenses have been used in many practical applications for beam collimating of LDs.

柱透镜因其结构简单、材料便宜以及加工容易而在半导体激光束准直领域获得较多的应用，但普通的圆柱透镜其准直能力非常有限，为了提高柱透镜的光束准直能力，设计出更加合理和可行的结构是目前在这方面研究的主要方向之一。

When the pane is transparent a laser beam passes straight through, but when the pane is diffracting, it splits the beam, bending it in several new directions.

玻璃片透明时，激光束能直接通过；而当它为衍射态时，它能分解光线，并向不同的方向弯曲光线。

The experiment and theory proved that the wear resistance and fatigue resistance of the ductile iron crankshaft could be greatly improved,and also the uniform layer of hardness and residual stress could be obtained by the second method-the laser circumference continuously scans the neck of crankshaft,and the laser forms 45°angle with the central line of crankshaft to scan the partial filleted angle of the crankshaft.

实验与分析证明：采用轴颈周向螺旋扫描，过渡圆角处激光束与轴心线成45°角的部分圆角的激光扫描处理方法，更能获得较为均匀的硬化层和残余应力，从而达到了提高曲轴抗磨损，抗疲劳的综合机械性能。

Methods According to the document of ISO/TC172/GW1 N80 about the test principle and the experimental demands of times-diffraction-imit factor M^2, beam diameters in different z places along the light direction were measured using LBA-300PC laser beam quality analyzing meter made in Spiricon Corporation of America. Hyperbolas were fitted utilizing the measured data.

根据ISO/TC172/SC9/WG1 N80文件对M^2因子的测量原理及要求，用美国Spiricon公司生产的LBA-300PC激光束分析仪，沿光传播方向在不同z位置，测出光束宽度，由测量数据进行双曲线拟合，确定束腰直径和远场发射角，计算M^2因子。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。