光栅

Its characteristic is through impulse stimulation by using the grating width, diffraction series, laser wavelength, and the Doppler frequency shift to determine the shock velocity and the shock acceleration instantaneous value.

对差动式光栅激光干涉冲击校准装置的原理作了介绍，特点是使用冲击激励，通过光栅的栅距、衍射级数、激光波长及激光的多普勒频移来最终确定冲击速度和加速度的瞬时值。

The measure unit adopts RENISHAW LP2DD probe. HEIDENHAIN linear and round encoders of the machine can as position feedback element. The measure system uses interruptive function of CNC system. When the probe is touched, CNC system will receive a interruptive signal and memory current coordinate position of CNC axes automatically, then after software deals with these information, the real measure data will be got. Compared with theory data, measure error data will be gained.

测量单元采用雷尼绍的LP2DD测头，用机床本身的反馈元件HEIDENHAIN的直线光栅和圆光栅作为位置反馈元件，利用数控系统的中断，当测头被触发时，给数控系统一个中断信号，数控系统自动记忆当前的数控轴的坐标位置，然后经过后续软件处理，得到实际测量值，再与理论值进行比较，得到测量误差值。

In Chapter 4, according to the special theory of relativity and using the Java object-oriented technique, we established a new ray tracing method which simultaneously obeys the Lorentz transformation and Doppler effects.

本文第三章把波动光学的多缝夫琅和费衍射理论应用于计算机真实感图形生成，通过在Whitted光照模型中增加一项光栅衍射光亮度，建立了一个基于波动光学的光栅衍射光照模型。

Results of this thesis indicate that the novel polymer DFB gratings fabricated via UV-photopolymerization can achieve high refractive index modulation and low surface relief. Since this method has obvious predominance over other fabricating methods, it is believed to have promising application future in the organic semiconductor lasers.

本论文的研究结果表明，基于紫外光聚合反应的新型聚合物光栅可以实现较高的折射率调制幅度，和很低的表面起伏深度，相比其它有机DFB光栅的制作方法具有明显的优势，因此在有机半导体激光器的制作中具有很好的应用前景。

Experimental results show that the refractive index modulation can reach about 0.010; and the depth of surface relief is low to about 0.7~12.4nm, which will be lower than 1nm in the gratings with 200~400nm period(according to the first-order and second-order DFB grating period of organic semiconductor lasers).

实验结果表明，折射率调制幅度较高，可以达到0.010左右；表面起伏很低，约0.7~12.4nm，在周期为200~400nm(对应于有机半导体激光器的一级和二级DFB光栅周期)的聚合物光栅中，表面起伏深度小于1nm。

This system includes two sets of BridgeMaster series transceiver/turning unit with INTERSWITCH,a Bridge Master 340 rasterscancolour ARPA as processor unit,a Video Master for recording Radar video/Autotrack targetsinformation/speech in a S-VHS tape recorder,a VTS manage computer,a training simulatorand a large screen synthetical display which could show radar and computer screen...

它是由两台互为备份的雷达收发机／天线，一个交换箱，一台用作数据处理中心的BridgeMaster340彩色光栅ARPA，一台用于同步记录雷达原始视频、ARPA跟踪目标数据及语音的VideoMaster，一台用于录像复示的BridgeMaster180彩色光栅雷达，一套用于VTS管理的计算机系统，一台自制的VTS训练模拟器及一台综合显示雷达图像和计算机数据的大屏幕显示器等组成。

So, this project adopts the realization scheme of double-pass raster monochromator plus direct drive and direct reading of the raster's angle position to control.

因此，本设计采用双通光栅单色仪加直接驱动直接读取光栅角位置控制的实现方案。

On the basis of analyzing the principle of fiber Bragg Grating strain sensor,a method of measuring projectile muzzle velocity is put forward.

在对光纤布拉格光栅应变传感原理分析的基础上，提出了一种易实用化的，能够实现武器弹丸炮口初速测试的方法，介绍了系统的基本组成，对光栅布拉格传感器弹丸炮口速度测试原理和方法进行了分析。

Based on Kogelnik's one-dimensional coupled-wave theory and dispersed Fourier transform, the diffractive characteristic of two pieces of volume phase gratings, which are cascaded and having orthogonal grating vectors for the continuous-wave laser beam, is analyzed.

利用Kogelnik一维耦合波理论，以及离散傅里叶变换，分析光栅矢量相互正交，且串联级联放置的两透射型体相位光栅对空域任意分布的连续激光光束的衍射特性；讨论其对入射光束的空间低通滤波性能，并具体模拟其对畸变高斯光束空间低通滤波的效果。

Osmometer. Fiber grating sensor is a new generation of international fiber-optic sensor, with the nature of explosion-proof, anti-strong electromagnetic interference, anti-lightning, can easily use the WDM technology in a single fiber in the series Multiple fiber Bragg grating sensor, thus forming quasi-distributed measurement and so on.

光纤光栅传感器是目前国际上新一代光纤传感器，具有本质防爆、抗强电磁干扰、防雷击，能方便地使用波分复用技术在一根光纤中串接多个光纤光栅传感器，从而形成准分布式测量等优点。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。