光栅

Accordingly, study and development of fiber Brag grating accelerometer is very significant.

研究和开发新型的光纤光栅加速度传感器具有十分重要的意义。

Accuracy is stated in microns per meter of travel. Scales are specified with an accuracy grade (i.e.±5μm/m).

光栅尺的精确度等级定义如下：在任意1米测量长度区段内测量值和标准值的最大误差。

In general, the corresponding line of the grating with bigger effective acreage is stronger than others.

在实验中我们通过调节两光栅的有效使用面积，将两谱线的能量比例控制在1∶1左右。

The meaningful regions obtained by range image segmentation correspond to the surface patches of 3D object.The 3D surface patches are then reconstructed by the algebraic surface fitting method;the surface parameters are estimated by solving generalized eigenvector problem. The geometric model of 3D object is constructed from reconstructed surface patches by using CAD geometric modeling tool GEOMOD.

首先通过编码光栅方法获取三维物体的深度图象，并采用数学形态学的方法加以分割，然后利用代数曲面拟合手段对分割后的三维曲面片进行重建，并使用CAD几何建模工具由重建的曲面片构成物体的几何模型。

These all have different image characteristics and representations such as ASCII (American Standard Code for Information Interchange) for text, vector for graphs, and raster for pictorial images.

这些全部有不同图像特性和表现，例如？ASCII( American Standard Code for Information Interchange 美国信息交换标准代码)，矢量图形和光栅图像。

Anastigmatic mounts of concave gratings based on this algorithm are optimized,and numerical results are simulated.

基于此方法讨论了无象差点结构凹面光栅的优化设计，并给出了数值模拟结果。

The system is composed of an off-axis Three-Mirror Anastigmatic telescope and two Offner convex grating spectrometers.

该系统由离轴非球面三反射镜望远成像系统和两个Offner凸光栅光谱成像系统组成，通过改变两个光谱成像系统的变倍比来实现两种探测器的匹配。

As a result, if the iridescence is produced by thin-film interference, not only the thickness of lamellar structure must be defined within a certain nanometer, but also the refractive index need to be different between lamellar structure. In other words, the chemical composition, refractive index and thickness of exsolution lamellae need form to trinity, such as labradorite, albite, andradite and orthoamphibole. If the iridescent color is produced by grating-diffraction, the lamellar structure just needs to be arrayed regularly, the spacing of the edges of lamellar structure needs to be regular and narrow, but not necessarily within the range of the wavelength of visible light, such as shell of abalone, pearl and opal.

薄膜干涉式晕彩不仅要求宝石内部结构层的厚度必须在一定的纳米范围内，而且结构层内部的折射率也必须有所差别，也即，当结构层由两相组分出溶而成，其化学成分、折射率和结构层厚度形成三位一体时，符合薄膜干涉式晕彩，如拉长石、钠长石、石榴石和角闪石；而光栅式衍射晕彩则仅要求结构层排列规则，边缘狭窄但不需要窄到可见光波长范围内，能使入射光的振幅或位相，或两者同时产生周期性空间调制的结构即可，如鲍贝壳、珍珠和欧泊。

For initializing the reference quantity of Bragg wavelength, the vertex angles of the biprism are determined by the 1 diffraction angle of phase mask and the refract index of the biprism.

为了初始化Bragg波长的参考值，双光栅的顶角由相位掩模的1级衍射角和双棱镜的折射率确定。

This distance relates directly to wavelength and depends on the grating groove density and angle of incidence.

这个距离直接与波长有关，并取决于光栅线密度及入射角。

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。