We take the equivalent radius, second-order-moment and the match efficiency as definition of the waist radius of laser beam, and study which condition is effective.
在傍轴条件下,应用瑞利—索末菲标量衍射积分公式推导出激光光束经光阑和透镜变换后衍射场分布表达式,数值分析了光阑孔径变化对激光光束衍射场振幅分布的影响,讨论了分别以振幅下降到最大值的1/e、二阶矩和最大匹配效率作为受限激光光束等效束腰半径定义的适用情况。
When the radius of the beam waist is twice bigger than that of the pupil, the image quality is almost invariant.
当束腰半径2倍于光瞳半径以上时，成像质量几乎不受高斯光束的影响。
The relation between UV conversion efficiency and focused green Gaussian beam waist in BBO crystal
强会聚入射时,BBO晶体倍频效率和束腰半径的关系
The design of the gun is commonly defined by perveance, beam current, waist radius, waist position and cathode current density.
它的设计主要有导流系数、流、腰半径、腰位置以及阴极电流密度。
The minimum and maximum girdle diameters are determined by taking a number of diameter measurements.
最低纲领与最高束腰直径决意采取了若干直径测量.
The relation is discussed between the shift of the point of maximum intensity on axis from the waist of focused Gaussian beam and the radius of the diffracted aperture, and the parameters of the Gaussian beam.
讨论了轴上点光强最大值相对会聚高斯光束束腰的偏移量同衍射孔径及高斯光束参数的关系。
Determination of transitional fillet radius for hydroformed workpiece under wall thickness constraint
以壁厚约束的内高压胀形件过渡圆角半径确定
She girded her waist with a sash.= She girded a sash round her waist.
她以饰带束腰，她把饰带束在腰上。
The radiuses of equivalent Gaussian beam of different kinds of lasers are studied by using 86.5% loop enclosing power method.
利用86.5％环围功率法研究不同类型的激光器的等效高斯光束半径。
Study on Theoretical Elongation of Small Radius Prestressing Tendons in Anchorage Zone of Cable-stayed Bridge Pylon
斜拉桥索塔锚固区小半径预应力束理论伸长值研究
white elastic-waist gym pants
白色宽紧束腰体操裤
cotta, not kniited or crocheted
束腰外衣,非针织或钩编
corduroy wrap-around coat
粗条纹绒布束腰外衫
She belted up her wind coat.
她把风衣的腰带束紧。
a long skirt gathered at the waist.
在腰部收束的一种长裙。
a skirt whose fabric is drawn together around the waist.
腰部收束起来的裙子。
belted mackinaw coat
骑诺式长方格束腰外衫
dramtic fleece greatcoat with broad laper and tie belt
开襟大领束腰羊毛大衣
shirred elasticized waist pajamas
打裥宽紧束腰睡衣裤