光束

The critical part of this sight is a holographic optical elements combined with a lensless Fourier transform hologram and a holographic beam transformer.

瞄准具的核心部件是由一块无透镜傅里叶变换位相全息图和一块全息光束变换器组成的全息光学元件。

We establish measurement twice on micro shift for testing superprism effect. And the "thin film gratings" measurement, which we adopt finally, has critically tunable monochroic system, collimated system and exact system for spot detection, realizing detect the micrometer-level shift of reflective and transmissive spots with high sensitivity and precision, and is useful for studies on dispersive device with high resolution.

为了更好地对超棱镜效应进行测试，本文先后两次搭建了微位移测试平台，尤其是最后采用的&光学薄膜光栅&超色散测试系统，采用精密可调的单色系统、小光束准直系统以及精密光斑位置检测系统，实现高灵敏度、高精度的反射光斑及透射光斑的位置检测，为超分辨色散器件的研究奠定了基础。

And we study the dynamic behavior of △n and △α in doped lithium niobate crystals by the new method.

我们用此方法观测了用聚焦单光束辐照掺杂铌酸锂晶体时，△α、△n的动态行为。

Composite optical vortices in two noncollinear cosh-Gaussian vortex beams and their propagation properties in free space.

离轴平顶高斯涡旋光束形成的合成光涡旋及其在自由空间中的传输。

Noncollinear second-harmonic-generation processes involving an unfocused laser ham and itS scattered radiation produce one or more cones of phasematched second harmonic.

激光束与其散射光束在晶体中发生非线性和频作用，在满足非共线相位匹配条件时，可观察到二次谐波环的现象。

The operation principle of doubly resonant Nondegenerate Optical Parametric Oscillator above threshold is described.

介绍了利用孪生光束制备亚泊松光场的实验原理、实验装置，并给出实验结果与分析。

The result shows that there is not a threshold for incoherent solitons exist in strongly nonlocal media because the model is linear.

在强非局域介质中光束的传输模式是线性的，因此孤子的形成过程中不存在一个非相干的阈值。

Focusing properties of Gaussian beam induced by nonspiral and spiral phase plates are investigated numerically.

研究了高斯光束经过非螺旋和螺旋两种相位片后的聚焦性质。

Then, the values of the OAM are calculated and the results are analyzed.

讨论了角向偏振态和径向偏振态光束的轨道角动量。

Single-scattering diffuse backscattering Mueller matrices expressions based on Stokes vectors of the backscattered light are derived when a narrow pencillike beam is perpendicular to the surface of the plane of turbid medium.

采用斯托克斯矢量形式，推导出当无限窄的连续光束垂直入射到混浊介质表面时，后向单次漫散射米勒矩阵的解析表达式。

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％。