光斑

The influences of the parameters of the nozzle and the laser on the welding process and the utilization ratio of the powder are researched during laser welding with powder.

研究了粉束落点相对激光光斑位置变化、送粉与焊接的相对方向对送粉时焊接过程和粉末利用率的影响。

The rib vault, flying buttress, and pointed arch were used as solutions to the problem of building a very tall structure while preserving as much natural light as possible.

借着拱顶肋、飞扶垛和尖拱，使建造极高结构而尽量保持自然光的问题得以解决；彩绘玻璃窗条造成令人惊讶的室内光斑效果。

The focusing beam radius' ratio between the telescope lens compound system and the single lens increases via length (70~400mm) increasing, and the maximum ratio is 30, meanwhile the ratio between the telescope-lens compound system and the single lens decreases via length (70-400 mm) shorting, but the maximum difference of the focusing beam radius' is 0.043μm.

结果表明，随着距离(70~400mm)的增加，两者的聚焦效果相差增大，最大为30倍；随着距离(70~400mm)的减小，两者的聚焦效果相差减小；经望远镜和薄聚焦透镜组合系统聚焦的高斯光束束腰处光斑半径随距离(70~400mm)变化的最大值为0.043μm。

These laser measuring devices aim a Class 2 visible laser spot onto your target to accurately gauge its distance.

这类激光测量设备通过发射一束class2的可见激光在目标上形成一个光斑从而准确的测量出距离。

He raised the wand above his head, brought it swishing down through the dusty air and a stream of red and gold sparks shot from the end like a firework, throwing dancing spots of light on to the walls.

他把魔杖高举过头，飕的一声向下一挥，划过尘土飞扬的空气，只见魔杖头上像烟花一样，红色和金色的火星四射，跳动的光斑投到四壁上。

How to simulate a star point was described by analyzing gray scale distribution characteristic.

在分析星点的灰度分布特点的基础上，明确了如何仿真产生一个星点光斑，并通过仿真实验验证了改进质心算法的有效性。

In order to reduce the loss of dimensional accuracy of stereolithography parts during the post-process, the stair-step effect and the relationship between stair-step effect and the parts dimensional accuracy were studied and analyzed.

研究和分析了光固化成形件台阶效应产生的原因以及对制件尺寸精度的影响，提出了根据表面几何特征进行相应的光斑补偿的方法。利用该方法成形的原型件会留有合理的打磨余量，从而可以在去除台阶效应的同时，保证制件的最终尺寸精

Then the optical spot of GRIN-rod lens is calculated in theory.

并从理论上对自行研制的自聚焦透镜的光斑尺寸进行了计算。

The numerical results show that as the truncation parameter increases the actual focus shifts towards the lens and the spot size becomes larger gradually.

数值结果显示，由于透镜的孔径对高斯光束的截断使得焦点向着透镜迁移，截断参数愈大，焦移量愈大，成像光斑愈大。

Taking no account of aberrations,the optical spot size of the lens whose diameter is 1.80 mm is 1.2 μm.Compare the measurement value which is 1.5 μm with the theoretical one,they are almost identical with each others.It also proves the theoretical analysis is reasoned.

在不考虑像差的情况下，直径为1.8 mm的透镜其出射光斑直径为1.2 μm，利用狭缝扫描法进行了实际测量，测量值为1.5 μm，理论值与实验值基本吻合，从而说明理论分析的合理性。

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。