光栅

The results of measurement of such electronic extensometer are instable and then more errors may be included. The first writer of this paper designs the two-side electronic extensometer, which also has two edges but it can be fastened on two symmetric sides of the tensile specimen.

最近四十年发展起来的各种电子引伸计在讯号放大及数据采集和处理方面有非常突出的优点，但大多数电子引伸计如单侧电子引伸计(图1)、光栅引伸计和视频引伸计都是测量拉伸试样单侧的变形[3]，笔者称它们为单侧电子引伸计。

The method of gluing long grating to fan-shaped wheel resolved the problem of measuring of angle.

将长光栅贴在扇形轮上的办法来解决角度测量的问题，对测量系统进行空间定位。

According to the analytical expression, the phase grating of periodic and non-periodic system is calculated and the result keeps good agreement with that by fast Fourier transform, and the computation time is reduced up to 7 times comparing with fast Fourier transformation which is important to realize monitoring in situ in modern high-resolution technique.

3由以上解析式计算得到的晶体和非晶体的相光栅结果与快速傅立叶变换的结果一致，且能有效地缩短计算时间，这对于实现现代高分辨象的实时监测是很有意义的。

Thus, the studies on theory and application of fiber gratings become very important.

因此，光纤光栅的理论和应用研究具有重要的实际意义。

The particular functions and the impact to the systemic performance of the critical elements such as lighting system, grating, field lens and electronic ocular are analyzed.

对系统的关键性部件如照明系统、光栅、物镜和电子目镜的选用以及它们对系统性能的影响进行了分析。

In the experiment,by adjusting the manual tunable fiber Bragg grating and control the transmission of the light through the filter band,the operating center wavelength of the fiber lasers could be tuned from 1 047 nm to 1 055 nm and pulse duration at a repetition rate of 4.9 MHz.

实验中，在保证锁模状态稳定的情况下，通过调节可调谐光纤光栅滤波器，使激光器输出锁模脉冲的中心波长在1 047 nm～1 055 nm范围内连续调谐，重复频率稳定维持在4.9 MHz。

By means of increasing control fineness and optimizing scanning frequency, the uniformity of grating is improved.

通过提高光刻镜扫描的控制精度和优选扫描振动频率，能够改善光栅的均匀度，以满足曝光的需要。

Rigorous first order vector couple-wave theory of planar grating are expanded to more complicated surface-relief grating case.

从计算结果可以看出：在特定的条件下，光栅可以达到非常高的衍射效率，理论上接近100％。

For monitoring building structure,one kind of more fitful FBG sensors is presented.

提出了一种适用于建筑结构传感的光纤光栅传感器。

Triplexers are designed based on SOI flattop arrayed waveguide gratings.

设计了基于绝缘层上硅平坦化阵列波导光栅单纤三向器。

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。