查询词典 beam-focusing

Based on the Jones matrix method and the reflect characteristic of coating film on mirror, the physical model of polarizing beam splitting in altazimuth Coudé telescope is built.

基于镜面膜层复振幅反射特性，采用琼斯矩阵描述方法，建立了偏振分光物理模型，研究了共孔径发射和接收偏振耦合分光的效率问题，并与实验结果进行了比较。

In the experiments of Rayleigh laser guide star for adaptive optics on altazimuth Coudé telescope, the technology of LGS launched and received in the common aperture using polarizing beam splitting scheme is researched.

在地平式折轴望远镜上开展自适应光学瑞利激光导星实验，研究了信标光束同孔径发射和接收偏振分光技术。

The physical model of polarizing beam coupling and splitting system using altazimuth coude telescope is built up based on Mueller matrix and Stokes vector. The phenomena of the decreasing of the receiving efficiency are successfully explained by this model. Three dynamic phase compensation solutions are proposed: 1 Two quarter-wave plates are rotated to compensate the phase of the laser.

针对这个问题，建立了地平式折轴望远镜的共孔径偏振耦合分光模型，用Stokes矢量和Mueller矩阵分析了在望远镜旋转过程中激光偏振态的变化，数值模拟计算了望远镜处于不同方位角和天顶角时的偏振耦合分光效率，解释了实验中观察到的望远镜旋转导致偏振耦合分光效率退化的现象。

In this thesis we investigate the beam propagation and amphoteric refraction in a Uniaxially anisotropic crystal.

本文在理论上研究了单轴晶体中的光束传输和正负折射现象。

The measurement of hel beam far field with hole grating beams ampler .

孔栅分束镜测量强激光远场光束质量的研究。

The easurement of hel beam far field with hole grating beams ampler.

孔栅分束镜测量强激光远场光束质量的研究。

Burner to provide the "analog recording" and "burn" the difference is whether or not the order of laser beam shot, while others are exactly the same operation, that is to say,"burn simulation" to test whether or not the source of the normal CD-ROM, hard drive speed is fast enough, the remaining disk space to burn, such as the adequacy of the state of the environment, but can not burn the disc to be tested if there is a problem and the burner's laser to read and write the first match power with the disc and so on.

刻录机提供的"模拟刻录"和"刻录"命令的差别在于是否打出激光光束，而其它的操作都是完全相同的，也就是说，模拟刻录＂可以测试源光盘是否正常，硬盘转速是否够快，剩余磁盘空间是否足够等刻录环境的状况，但无法测试待刻录的盘片是否存在问题和刻录机的激光读写头功率与盘片是否匹配等等。

The characteristic equation of the beam is derived, as well as an analytic expression of its eigenfunction.

推导了此梁弯曲振动的频率方程及振型函数的解析表达式。

The specially used slope pressure plate and ancillary seal components can achieve the seal of the top of bridging beam and the drainage of the edge of pinch plate of pillar, and settle the joint of multi members of conical top. Ancillary materials can settle the outwardly turning of pyramid, and sequentially achieve kinds of complicated shaped skylight systems.

SK与A60系统采用相同的框架结构和配套材料，可实现空间角度的T形连接，设置专用的斜坡压板及配套密封件，可实现横梁压板端部密封和立柱扣板边缘的排水，可解决锥形顶部多杆件的连接，配套材料可以解决棱锥外转角，从而实现各种造型复杂的采光顶结构。

The study that comprehensive and systematic analyze the factor of links length, thickness of links flange, distance of links rib, thickness of links rib and angle of brace to be changed affect energy-dissipation capacity of D shape and K shape eccentrically braced steel frames have been some studied before. This paper fills the black in the filed factor of high-span ratio, brace stiffness and brace-to-beam connections to be changed affectenergy-dissipation capacity of D shape and K shape eccentrically braced steel trames and any factor to be changed affect energy-dissipation capacity of Y shape eccentrically braced steel frames.

对耗能梁段的长度、耗能梁段腹板的厚度、耗能梁段翼缘的厚度、耗能梁段加劲肋的间距、耗能梁段加劲肋的厚度、支撑的夹角等因素的改变对D形、K形偏心支撑钢框架耗能的影响，前人已有一些研究，本文对这些因素的影响进行了全面系统的分析，完善了理论分析的不足；而结构高跨比、支撑刚度、支撑与梁的连接形式等因素对D形、K形偏心支撑钢框架破坏机理的研究以及各种因素对Y形偏心支撑钢框架破坏机理的影响，则很少有人涉及，本文对此也进行了深入系统的分析，填补了这一研究空白。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。