衍射方向

本文介绍了由不同焦距与不同衍射方向的全息透镜组合而成的一种新型全息元件。

A new holographic optical element ( HOE ) consisting of the hololenses with different focal length and diffraotional channel is described .

为了避免AOM衍射光束方向变化同时还要提高AOM的频率动态范围，采用AOM的双次通过光路。

To avoid the location shift of diffraction beam and increase frequency dynamic range , double-pass diffraction of AOM was employed .

高密勒指数晶面衍射和测量方向的合理选择有助于提高测量精度，也利于经典sin2ψ分析法实验线性关系的建立，从而简化了分析和计算程序。

The reasonable selection of diffraction lattice planes with high Miller index and measuring directions would win the favor of enhancing the measuring precision , establishing the linear experimental relation for the classical sin ~ 2 ψ method and simplifying the procedure of stress analysis and calculation .

实验结果表明，衍射光的方向并不是简单地符合某种假设，而是与两写入光的角度和光栅的倾斜度有很大关系。

The results show that , the direction of diffracted beam does not simply accord with one assumption , and it has a close relation with the recording angle and the grating slant angle .

外耳对接收到的声音信号进行衍射，突出某些方向的信号，作为方向滤波器对声音信息的重要部分接收放大并进行编码。

Outer ear diffracts the received sound signal and enlarge the signals from certain direction as a filter .

使用不可见激光束垂直投射到旋转全息圆盘上，产生复数衍射光束向不同方向传播。

The compound diffraction beam will be propagated toward different directions when the invisible laser beam is vertically projected on the rotary holographic disk .

但当入射光的方向与表面波的传播方向不共面时，衍射图样的分布方向与入射光并不共面。

However , When the direction of incident laser and the propagation direction of SAW are not in same plane , the diffraction distribution direction is not located in the plane with incident light . 2 .

在偏振全息中，衍射光的偏振方向依赖于物光和再现光的偏振方向，衍射像的噪声主要来源于再现光照射到样品上引起的散射。

In polarization holography , the polarization of diffraction beam is dependent on the polarizations of reference beam and object beam . The noise of the diffraction image mainly comes from the diffusion of the readout beam on the sample .

文中首先利用严格耦合波理论（RCWA）分析亚微米光栅的衍射特性，即各级次衍射光方向与光栅周期及入射光角度的关系，亚微米光栅的衍射效率与槽深的关系。

Firstly , the diffraction properties of sub-micron gratings is analyzed using rigorous coupled-wave theory , including the relationship of the direction of diffraction light in each grade and grating period , and the relationship between diffraction efficiency and groove depth .

X射线衍射峰的位置向衍射角减小的方向移动，晶格常数和相对强度增大。

8 , the crystal lattice constant and relative intensity are increased .