光斑

A Study on Fraunhofer Double-Slit Diffraction by Applying Simulation Technology;2. Based on Kirchhoffs theory,the approximate intensity formulas of double-slit diffraction of Gaussian Beam is derived under paraxial approximation with power series expansion methods.

依据基尔霍夫衍射理论，利用幂级数展开的方法推导出旁轴条件下高斯光束双缝衍射的近似光强计算公式，并通过数值计算对双缝衍射的基本特性进行了讨论，得出了与其他文献一致的结论，得出了高斯光束下的双缝衍射极小值点比平行光束双缝衍射的极小值点向外移，观察屏中心光能变小；光强分布可由激光斑在衍射屏处的参数调制的结论。

After the calculation, the physician can read the numbers of pulses that would be required for this ablation, and the sizes of the various pulses created with various spot scanning ,next ,the surgeon is able to utilize the star s4 excimer laser to create a prevue lens with this calculated ablation so that the patient can subjectively assess the vision quality benefits of this particular correction.

在进行计算以后，医师能读取切削手术必须的脉冲数量，并且由变量光斑扫描所带来的不同脉冲的大小，然后，外科医生能运用VISX STAR s4准分子激光子童打制虚拟角膜镜片，这样医生可以主观地评估这一特定的矫正手术的视觉质量的优越性。

The area-partitioned matching approach based on projective transformation is presented.

在采用投射大小光斑的方法中，提出了基于射影变换原理的分块匹配算法。

The propertied of the five-mirror cavity of the self-starting KLM laser were studied theoretically in the spatial field.

利用线性ABCD矩阵详细分析了五镜腔的稳区，以及在不同稳区中腔内各处的光斑半径。

It is not a postcard landscape but a series of colorful splashes, a blinding psychedelic light show

它不是一幅明信片上的风景画，而是色彩的光斑，令人头昏目眩、光怪陆离的迷幻灯光表演。

The pulsed Nd:YAG laser cladding is one of the most effective methods of the precise repairing technology. It is decided by the voltage, electric current, pulse length, pulse frequency, scanning speed and beam diameter of the Nd:YAG laser.

脉冲Nd：YAG激光熔覆技术是精密修复塑料模具最有效的方法之一，激光器的电压、电流、脉冲宽度、脉冲频率与激光的扫描速度、光斑直径等工艺参数直接影响着熔覆的质量。

Radarscope shows return pip.

图一：脉冲离开天线，目标反射，回波返回，雷达示波器显示光斑。

I take some training at the NAD center in Montreal, before that I was self taught, but I was just doing sphere with lots of reflection and boring box extrude alien with lens flare.

我参加了一些NAD的培训课程，在参加培训之前，我是自学的，不过我只是在球上面添加反射或者是无聊的盒子挤出建模，再配上镜头光斑效果。

The bending properties of sheet metal with four different laser source modes are simulat...

结果表明，在扫描过程中，圆形光斑热源模式获得了最高的峰值温度和上下表面温度差；而矩形1/4激光热源模式获得了最大的高温区作用宽度。

Then based on the second-order moment method, the closed-form expression of the beam width is obtained, and the beam waist width and waist location for elegant cosh square Gaussian and Sinh square Gaussian beams are also deduced.

基于二阶矩定义，分别推导了复宗量双曲余弦平方-高斯光束和双曲正弦平方-高斯光束的光斑尺寸、束腰宽度及其位置，并对结果作了详细的分析和讨论。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。