查询词典 beam-focusing

When a plane wave illuminates the bottom of axicon with ring obstacle, a bottle beam is generated within the maximum non-diffractional distance, and the beam keeps non-diffractional Bessel beam in front and at the back of the Bottle beam.

平面波入射到带有环形障碍物的轴棱锥底面时，将在轴棱锥产生的最大无衍射距离内形成Bottle beam，而在Bottle beam的前后仍然保持无衍射贝塞尔光。

BSpatial characterization of laser induced Cu plasma in air with different laser focusing distancesThe plasma spectra induced by pulsed laser ablation of copper target are measured. By adjusting the distance of the len-sample, the spectrum of air spark plasma、 Cu plasma and the reciprocity of both plasmas are analysed. From the result, it has been shown that the focusing of the laser beam has an important infunence to analyse the properties of the sample.

b 不同的激光焦点位置产生的等离子体光谱的空间特性研究激光烧蚀置于空气中的Cu靶产生等离子体，通过调节透镜与Cu靶的距离，本文观测了激光烧蚀空气产生的空气火花等离子体、激光直接烧蚀铜靶产生Cu等离子体以及空气火花等离子体与Cu等离子体相互作用等不同情况下的激光诱导击穿发射光谱，激光束焦点的位置在分析材料性质的过程中有着重要的影响。

Sagittal focusing monochromatizing principle about beam is based on Bragg law (2dsinθ=nλ) and the monochromic beam is obtained by changing Bragg angle θ.

光束弧矢聚焦单色化原理是指以Bragg定律(2dsinθ=nλ)为基础，改变Bragg角θ，获得所需的波长λ来实现光束的单色化。

The structure of the electron beam focusing and deflection system of electron beam exposure machine is analysed with computer-aided design.

由该电子束曝光机试验结果表明，复合系统结构简单紧凑，像差小而可以不用动态校正。

Design consideration and design methods for periodic reversal permanent magnet focusing system are presented ,special technical problems met in design of multi-beam electron gun with controlling electrode are discussed.2D computer software or magnetic field and electron trajectory of electron optics system has been established,and applied to calculate the electron optics system of S-band 200 kW multi-beam klystron.

给出了周期反转永磁聚焦系统的设计方法和设计考虑，讨论了控制极调制多注电子枪设计中遇到的特殊问题和解决方法，建立了计算电子光学系统的二维磁场和电子轨迹计算软件，并应用这些软件设计和研制了S波段200kW多注宽带速调管的电子光学系统。

In order to study self-focusing phenomenon of an intense short laser beam propagating in cold,underdense plasma,the more complete ponderomotive force of laser beam propagating with implicate term and Lorenz term was used.

为了更完善地研究强的短脉冲激光在次临界密度冷等离子体中传播时的自聚焦现象，采用了包括洛伦兹项和牵连项的更为完整的有质动力形式。

This study used the pick-up head from the commercial DVD-ROM as the basis for optical path, and drilled a 2mm hole on the focusing object lens. After combined with the design of a beams plitter, the laser beam source of the two DVD formed two in-line laser beams. One laser beam passed through the undrilled part, and focused on the surface of the object to be tested, in order to measure the displacement variance of the surface.

於三自由光学测探头的研制上，则将DVD 探头之聚焦物镜做一2mm 的穿孔，於搭配一分光镜的设计后，使个DVD 的光源形成同轴光束，将其中ㄧ光束经由聚焦物镜未穿孔部分，聚焦於待测物表面，用以测待测物表面的位移变化，另一光束则穿透过聚焦物镜穿孔部分，直接将光束投射至待测物表面，作为待测物表面之个角的变化测。

First, second and third position sensor controllers control the focus servo to focus the He--Ne laser beam on the glass substrate in response to the pit width of the glass substrate by sensing the laser beam for focusing reflectedupon the glass substrate.

此聚焦系统利用第一、第二、第三光点位置敏感器去控制氦一氖雷射，使其能够在玻璃基板上产生正确的凹坑宽度，而第一、第二、第三光点位置敏感器即藉著聚焦在玻璃基板上反射而回的氦一氖雷射作为聚焦控制。

The nonlinear Goos-Hanchen shift of a reflection light beam and the refraction angle of a transmission light beam can all be changed by adjusting the power of the incident light beam.

同时发现反射光束的非线性古斯-汉辰平移量及透射光束的折射角都可以通过适当改变入射光束的功率来调整。

The integral area for calculating the beam width by using the definition of generalized second-order moments is selected to ensure the energy in the angular domain more than 75% of the total beam energy and the measurement method and steps still follow the relevant ISO standards. The generalized M2 factor of truncated Gaussian beam has been measured. The experimental results for different truncated parameters have been compared with the theoretical results, showing the validness of the method proposed.

在利用广义强度二阶矩计算光束束宽时，以积分角谱范围能够包含光束总能量的75%以上作为积分范围的选取标准，并遵循现有的国际标准化组织规定的测量步骤和方法对截断高斯光束的广义M2因子进行了测量，并将不同截断参量时的实验结果与理论计算结果进行了比较，证明了该方法的正确性。

Vishnu entered a dark fourth dimensional dream that did not support his field or continued life.

毗瑟挐进入了一个第四密度的黑暗梦想，那里并不支持他的能量场或继续生命。

Leaders and decision-making persons use it to collect the data, including the information of unit work, handing in fee, oweing fee, prepaying fee,changing and afterpaying and account transfering of joining-insurance employee, and account paying of all kinds of insurances from hospitalization insurance institutions.The collected data is picked up, organized, switched and showed to user.

该子系统主要面向各级领导、决策分析人员；从各个医疗保险经办机构和定点医疗机构采集数据，包括在各个医疗保险经办机构处理的单位办公信息，单位缴费、欠费、预缴费信息，参保职工变更信息，参保职工增减变动信息，参保职工补缴信息，参保职工帐户划拨信息：包括各定点医疗机构处理的各险种帐户支出信息，各险种的统筹金支付信息等；将采集的数据提取，组织和转换，然后展示给用户。