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- It is well known that paraxial approximation and even scalar approximation are no longer valid for the beams with large divergence angles and small spot size comparable with the wavelength.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 far-field intensities and divergence angles of combined beam of two copper vapor lasers with UR90 resonators coupled at small magnification (M=1.21) were measured and analyzed experimentally. 并利用铜蒸气激光器实现了两台低放大倍率(M=1.;21)UR90腔的相干并束输出,对输出光束的远场方向性进行了测量分析。
- 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- It is well known that the paraxial approximation is no longer valid for the beams with large divergence angle and/or small spot size comparable with the wavelength.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。
- 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 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;
- One line cuts another at right angles. 一条线与另一条线成直角相交。
- The angles of a triangle total 180. 三角形的三角之和等于180°。
- A polygon whose angles are equal. 等角多边形各角都相等的多边形
- fast axis divergence angle(FADA) 快轴发散角
- divergence angle of gauss laser beam 发散角
- A polygon with ten angles and ten sides. 十边形有十个角和十条边的多边形
- Problems of Number Theory in Approximation Formula on the Divergence Angles of Plants 植物发散角近似公式中的数论问题
- A four-sided plane figure with four right angles. 矩形,长方形具有四个边的方形,有四个直角
- A plane figure with four sides and four angles. 四边形有四个边和四个角的平面图形