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- Divergence angle measurement of a laser beam by the threshold method 阈值法测量激光束发散角
- divergence angle measurement 发散角测量
- The diameter of facula can be calculated by image process on computer, then we can get the value of divergence angle through formula. 在计算机中用图像处理方法求出光斑的大小，再计算发敞角。
- BY using the Theory of Gauss Beam, this paper discusses on the problem of the divergence angle of the compressed semi-conductor laser, and makes the numerical analysis. 利用高斯光束理论对压缩半导体激光器发散角的问题进行了讨论,并且给出了数值分析。
- Isolators with different ratio of length to height (L/H) and divergence angle were investigated and the influence of back pressure on location of the shock train was analyzed. 在来流马赫数2.;3条件下，通过改变不同的反压来研究反压对不同长高比等截面隔离段和带扩张角隔离段激波串起始位置的影响。
- The effects of swirl number of primary swirler and radial swirler,area ratio and sleeve divergence angle on the cold flow field of double swirl air intake were investigated. 试验研究了主、径向涡流器旋流数、面积比、套筒扩张角等参数对双旋流进气装置冷态流场的影响。
- It is well known that the paraxial approximation is no longer valid for the beams with large divergence angle and/or small spot size comparable with the wavelength. 当光束具有较大的发散角或光束束腰可与波长相比拟时,傍轴近似不再成立。
- Monopulse radar is widely used for its high angle measurement and powerful anti-jamming performance. 摘要单脉冲雷达因其测角精度高，抗干扰能力强，使其得到了广泛的应用。
- Comparing to original cavity,the output energy increase about 40 percent,the width of output pulse decrease about 10 ns,the divergence angle decrease 0.1 mrad under the same conditions. 同等条件下;改进型对撞腔输出能量约提高了约40%25;脉冲压窄了约10ns;发散角减小0.;1mrad。
- Methods While we knew the shape,orientation and SAD of the fields;by calculating the divergence angle and rotating the gantry,collimater,table within the angle to modulate the fields. 方法在已知某一照射野大小、方向和源轴距的情况下,计算出射线束发散的夹角,并依照该角度对机架角、准直器和治疗床做出相应的旋转调整。
- The angle measurement of monopulse technique, the problem of angular glint and the acquirement of high resolution range are introduced at length in this paper. 文中从单脉冲天线的发展出发，详细介绍了单脉冲测角技术，角闪烁的问题以及单脉冲距离的高分辨率的获取。
- The relative errors of the beam width and far-field divergence angle introduced by the spherical aberration increase with increasing spherical aberration coefficient and decreasing beam order. 束宽和远场发散角的相对误差随球差系数绝对值的增加和光束阶数的减小而增加；
- The output mode field diameter(MFD)and divergence angle are predicted by empirical equations, simulated by finite-difference beam propagation method(FD-BPM)numeric tool, and experimentally observed. 利用射线理论和经验公式给出了TLF基模光斑和发散角;
- Optical methods are one of the most effective way of dynamic angle measurement with high accuracy. 光学测角法是高精度动态角度测量的一种有效的解决途径。
- The precision polygons are easy and accurate angular standards for angle measurement and calibration. 正多面棱体作为计量基准，角度传递基准，已被广泛应用。
- A roll angle measurement system using a transverse Zeeman laser is presented in this paper. 提出了一种基于横向塞曼激光器的滚转角测量系统,实现了大范围、高精度的滚转角测量。
- Angle measuring MWD tool is widely used in field well drilling. 随钻测斜仪在钻井现场中应用相当广泛。
- The hull deformation influences the angle measurement accuracy of shipborne IRST. 船体变形会对舰载红外警戒系统获得的目标测角数据的精度造成影响。
- It is well known that paraxial approximation and even scalar approximation are no longer valid for the beams with large divergence angles and small spot size comparable with the wavelength. 当光束具有较大的发散角或光束束腰可与波长相比拟时,傍轴近似,甚至标量衍射理论都不再成立。
- The angle-encoder principle and design are introduced, mathematics-logical method of angle measurement circuit are introduced. 摘要文章简要介绍了编码器的工作原理，给出了角度测量电路的一种设计方式及信号的运算处理方法。
