查询词典 angular aperture

It showed that the energy focusability of the diffraction beam depended on the transmission distance,diffraction aperture and facula radius,and appropriate energy focusability could be obtained by controlling some parameters of the optical system.

研究结果表明，衍射光束的能量集中度与传输距离、衍射孔径、光斑半径等参量有关，通过对光学系统参量的控制，可得到合适的能量集中度。

One is the fenestra type, through a defect in the broad ligament, and the other is the pouch type, with herniation into an anterior or posterior aperture of the broad ligament.

CT的特征表现如下：盆腔内见含气液平面的簇状扩张的小肠肠襻，肠襻压迫腹侧的子宫和背外侧的直肠乙状结肠。

Eyepieces are differentiated by their '' field stop '', which is the narrowest aperture that light entering the eyepiece must pass through to reach the field lens of the eyepiece.

目镜由他们的''视野阑''做区分，这是进入目镜的光线抵达场透镜前所经过的最狭窄孔径。

Film Gate: Components that make up the pressure and aperture plates in a camera, printer, or projector.

片门：在摄影机，印片机或放映机用来调整压力和片门板的零件。

Phase structure function and aperture-averaged slope correlation function with finite outer scale are derived.

导出了有限外尺度影响下的相位结构函数和孔径平均的斜率相关函数的表达式，结果表明有限的大气外尺度对大气湍流统计特征的测量有很大的影响，尤其对大尺寸的望远镜和子孔径更是如此。

Based on Collins integral formula and the expansion of the hard aperture function into a finite sum of complex Gaussian functions,the approximate analytical expression of the diffraction field of Gaussian beam by a circular disc is derived,and its characteristics are analyzed by the numerical calculation and numerical simulation.

基于圆孔光阑函数展开为复高斯函数和的方法，用Colins积分公式，导出了高斯光束照射下圆盘衍射的光场近似解析表达式，经计算机数值计算，对高斯光束照射下圆盘衍射的衍射特性进行了详细的分析

With aperture expanded as the sum of finite complex Gaussian terms, a more practical approximate analytical solution of fractional Fourier transform of Gaussian beam in an apertured paraboloid refracting system is obtained and also numerical investigation is presented.

通过将孔径函数展开为有限项复高斯函数之和，得到了高斯光束在受孔径约束的抛物面折射系统中分数傅里叶变换较符合实际的近似解析表达式，并进行了数值模拟。

Based on the Collins formula, the analytical propagation equations for a Gaussian beam through a multiple spatial filter system are derived by using the methods of the matrix decomposition and expanding the aperture function into a finite sum of complex Gaussian function .

以Collins衍射积分公式为基础，利用A0CD矩阵分解与物理实现的技巧，以及将硬边光阑窗口函数展开为有限个复高斯函数之和的方法，推导出了高斯光束通过多级空间滤波器系统的传输方程，并用数值计算加以说明。

The propagation of cosh Gaussian beams through a first order paraxial optical system with rectanglar hard aperture is studied. By using the expansion of the rectangle function into a finite sum of complex Gaussian functions a closed form propagation equation of cosh Gaussian beams is derived.

对双曲余弦高斯光束通过有硬边光阑的一阶ABCD光学系统的传输进行了研究，采用将矩形域函数表示为复高斯函数叠加的技巧，推导出了解析的传输公式，在特殊情况下，该公式简化为在无光阑情况下的传输公式。

This' paper mainly researches on the humidifying property of the centrifugal nozzle with firing pin type, high pressure and little aperture.

课题主要对撞针型高压小孔径离心式喷嘴的雾化加湿性能进行研究。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。