光束

In practice, when coordinates of two angular of two beam of LD/PSD are measured, people can gained the relative position.

在实际测量中，只要测量双光束LD/PSD 在两个角度时光斑的坐标，即可求得两轴的相对位置。

In order to study the grating diffractive field's characteristics of the partially polarized and coherent beams, an analytic expression of polarization degree and angular correlation of partially ploarized and coherent beams through polarized gratings is derived based on the beam coherentce-polarization matrix approach of partially coherent beams.

为了研究部分偏振部分相干光光栅衍射场的衍射特性，利用部分偏振部分相干光的光束相干-偏振矩阵，推导出了部分偏振部分相干光通过任意偏振光栅后，衍射场的偏振度及场中衍射级次角相关的一般解析表达式。

Improved laser-beam uniformity using the angular dispersion of frequencymodulated light.

李平，马驰，粟敬钦，张锐，王芳，程文雍，"时域与空域结合实现光束匀滑的光谱优化分析"，中国激光 35，

LASER GYRO, A gyro which uses two laser light beams to measure angular rotation.

激光陀螺仪，一种由两条激光光束来测量旋转角速度的陀螺仪。

In addition, method of the measurement of the orbital angular momentum is demonstrated.

另外也介绍了到目前为止测量光束轨道角动量的方法。

In chapter 4, methods for producing beams with orbital angular momentum are introduced.

第四章介绍了产生拥有轨道角动量的光束的方法。

In recent years, there have been many researches focusing on orbital angular momentum of light beam in the field of optics.

近年来，在光学领域内，关于光束轨道角动量的研究，受到广泛的关注。

In chapter 3, the orbital angular momentum of complex astigmatic elliptical beams is investigated.

第三章研究了复杂像散椭圆光束的轨道角动量。

Rotation of particles by using the beam with orbital angular momentum .

利用具有轨道角动量的光束实现微粒的旋转。

The results are helpful to the research of the focus of partially coherent annular beam.

这些结果对研究部分相干环形光束的聚焦性质是有帮助的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。