光斑

The results show that the diffraction spot of a spectrally dispersed beam becomes larger and its near-field uniformity is improved,while there exists area where the intensity is nearly even within the far-field spot.

模拟结果表明，光谱色散会使光束衍射光斑变大，近场空间强度均匀性改善，而远场光斑内部存在光强接近于均匀分布的区域。

A tungsten halogen lamp and a projecting lens are used to generate the collimated light. A CCD detector is used as light spot position sensor to measure the changes of the spot position at the rear focal plane of the imaging lens, and the optical angular deviation can be derived.

采用钨灯和投射透镜产生准直白光，用CCD探测器作为光斑位置传感器在成像透镜的后焦面测量光斑位置的变化，从而可得光学角偏差。

The principle, measuring method, structure and parameters of the device are given and the centroidal calculating formula of elliptical spot is derived.

给出了测试的基本原理、测试方法、测试装置的结构以及元件参数设计，并推导了椭圆光斑时光斑质心定位算法。

Based on the second order moment method recommended in ISO11146 international standard,the facular of the sender after focused by using CCD can be measured and divided into several parts to get the factor M2 of the sender of laser fuse.

以ISO11146标准中的二阶矩法为基础，使用CCD采集聚焦后的光斑图像，并对光斑图像进行分块处理，从而得到激光引信发射组件的M2因子。

Through particular analyzing the points of the spot's image with slantwise magnification,the secret of spot's image was opened out.

利用倾斜放大率，深入分析了光斑成像的规律，揭示了实际光斑的成像特点。

Through particular analyzing the points of the spot's image with slantwise magnification, the secret of spot's image was opened out.

利用倾料放大率，深入分析了光斑成像的规律，揭示了实际光斑的成像特点。

Besides main specula and diffraction spots,in order to prove bright points distributing regularly adjacent to main facular with 3CCD irradiated by laser,it was explained by the theory of Fourier optics and simulated numerically.

为了研究激光辐照3CCD，除观察到主光斑、衍射光芒外，主光斑附近呈现规则分布的亮点。

Based on the expression of diffractive field distribution of the Gaussian beams restricted by a rectangular aperture and focalized by a lens,the relationship between the width of the rectangular aperture and the spot size of the restricted beam,as well as the relationship between the aperture width and the power in the bucket,was numerically calculated with MATLAB.

为了研究矩形光阑边长与透镜像方焦面处光束光斑尺寸以及光斑内所包含功率的关系，根据高斯光束经矩形光阑和透镜变换后在透镜像方焦面的衍射场分布表达式，采用MATLAB进行数值计算的方法，进行了理论分析。

The instrument can measure the location, size and energy distributing of infrared guidance head imaging facula on the best image plane and off focus plane, displaying the results in data and 3D images with just one tap on the button. It can measure abaxial faculas as well.

它用数据和三维图形显示测量结果，可用于检测红外导引头最佳像面和离焦像面光斑的位置、大小及光能分布，并用于测试轴外视场的光斑，全部检测实现了&一键通&。

The simulation was conducted by using steel 25 powder. Results show that great temperature gradients exist in the front of laser spot, and phase transformation temperature of powder around laser spot is higher than the powder's melting point.

以25号钢粉末为烧结材料进行了数值模拟，模拟结果表明：激光烧结过程中，在光斑中心的前端存在着极大的温度梯度；光斑中心的温度高于金属粉末的熔点，烧结过程中存在液相。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失