激光束

In this paper, the profile along the line focus is simulated and analyzed in details based on the principle of physical optics.

随时改变能动反射镜形状以调制波面位相，能将入射激光束变换成辐照均匀、长度在一定范围内连续可调的焦线。

This invention relates to a method and device for generating cold atomic beam. Said method includes heating hot atom source in vacuum chamber to form atomic saturated vapor pressure atmosphere, cooling hot atom by three-D MOT to below 200uk and trapped to form cold atomic cloud, by the quarter wave plate reflection mirror in MOT the laser radiation pressure being unbalanced to make cold atom emitting along said direction, four tape arranged straight line set with contrary current direction is set in atom beam emission direction, which makes the atom emitted to forward to obtain cold atom beam with low speed, large flux and small transverse speed, laser beam vertical with atom beam set in the direction of cold atom emitting for atom beam state preparation to realize state concordant emitted cold atom beam.

本发明涉及一种冷原子束产生方法和装置，该方法包括在抽真空的真空室内，加热热原子源，在真空室中形成相应的原子饱和蒸汽压气氛；采用三维MOT对热原子进行冷却，冷却到200μk以下，并被捕获形成冷原子云团；通过三维MOT中开小孔的四分之一波片反射镜，而使得在该方向上激光辐射压力不平衡，使冷原子沿此方向出射；在冷原子束出射方向上，还置有载有彼此电流方向相反的四根成锥形排列的直导线，从而原子出射时将在磁场的作用下，不会沿横向膨胀而向前射出；便得到了出射速度低的、通量较大的、横向速度非常小的连续冷原子束；同时在冷原子束的出射方向上，设置有与原子束垂直的激光束，用于原子束的态制备，实现态一致的出射冷原子束。

Laser bending is a forming technology which makes use of a thermal stress and thermal strain to achieve sheet metal bending in recent year, and it needs no die and external force. The laser beam energy has good controllability. Laser technology is used in forming of magnesium alloy sheet, this can full play the unique advantages of the technology.

激光弯曲成形是一种利用热应力来实现板材成形的技术，激光弯曲成形不需模具和外力，且激光束能量集中具有良好的可控性，将激光成形技术用于镁合金板材成形，可以充分发挥该技术的独特优势。

Theory of small-scale self-focusing of intense laser beams in media with gain and loss .

增益介质中高功率激光束的小尺度自聚焦理论研究。

Furthermore, under condition of larger and stable laser energy output, the modified main-switch still inherits the high-voltage resistance of ring-small disk main-switch supported by circular metal pipe, and keeps laser beam with narrow pulse width.

改进的主开关在获得稳定而较大输出能量的情况下仍然继承了金属圆筒支座圆环-小圆盘型主开关的高耐压性，同时保持了激光束较小的脉宽。

In order to move, our hero has to block laser beams that guard all passageways or destroy laser cannons.

为了推动，我们的英雄已经阻碍激光束的后卫所有通道或破坏激光大炮。

The translated image data are the data of the beam source deflections.

转换后的图象数据是基于激光束的偏转数据。

The plasma has an index of refraction lower than one and causes a defocussing of the laser beam.

等离子体具有折射率低于之一，并造成defocussing的激光束。

One of the most popular ideas for building a quantum computer with trapped ions would involve having many ions, entangled and in superpositions, whizzing around and being manipulated by laser beams," says Jost."

一个最流行的想法，建立一个量子计算机与被困离子将涉及了许多离子，并在叠加纠缠，呼啸周围和被操纵的激光束说，&乔斯特。&

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。