光栅

Using two symmetrical plano-convex lens system to fabricate grating was analyzed and the characteristic of diffraction wavefront aberration of the grating was summarized by ray tracing program using MATLAB siftware.

分析使用两个对称的单平凸透镜光路制作光栅并用MATLAB编写光线追迹程序分析了所制作的光栅的衍射波像差的特点，经计算得出在较小焦比D/F情况下其衍射波像差仅与两支光路点光源的调节偏差之差有关与单独的各个偏差无关；初级像差中球差很小几乎可忽略：彗差仅与垂轴调节偏差之差成线性关系；像散仅与轴向调节偏差之差成正比；且当平凸透镜的焦比D/F增大时，各像差项迅速增大。

Ray tracing theory is used to obtain phase and universal polynomial function of grating,and the coefficient of the polynomial function is optimized by genetic algorithm.

该方法根据光线追迹原理设计获得光栅相位和面形多项式函数通式，采用遗传算法优化面形多项式函数系数，分别设计了分束比为1：2×2、1：3×3、1：4×4的光栅分束器件；其衍射效率分别为81.83%、81.11%和74.01%；三个器件的光强均匀性分别达到0.02394、0.1838和0.1912，并用Matlab进行了仿真。

Ray tracing theory is used to obtain phase and universal polynomial function of grating, and the coefficient of the polynomial function is optimized by genetic algorithm. Several grating splitters with ratio 1:2×2, 1:3×3, 1:4×4 and diffraction efficiency 81.83%, 81.11% and 74.01% respectively are designed based on the method.

该方法根据光线追迹原理设计获得光栅相位和面形多项式函数通式，采用遗传算法优化面形多项式函数系数，分别设计了分束比为1：2×2、1：3×3、1：4×4的光栅分束器件；其衍射效率分别为81.83%、81.11%和74.01%；三个器件的光强均匀性分别达到0.02394、0.1838和0.1912，并用Matlab进行了仿真。

Five, servers, and raster image processor computer to plate system must have a powerful server and raster image processor, onlyfailing bulk file is stored centrally archived, and print queue management.

五、服务器及光栅图像办理器筹算机间接制版编制务必给有一个功用不弱不小的服务器及光栅图像办理器，能达成不小容度文件的集洋保存归档以及打印部队处置。

Vexel art is a digital art that is an entirely pixel-based form of raster art that imitates the vector graphics technique, but is distinguished from normal vector graphics or raster images.

Vexel art是一种数字艺术，完全是基于像素的光栅艺术形式，模仿矢量图形技术，但正常的矢量图形和光栅图像是有区别的。

Polygon scan conversion raster graphics through the realization of the classic polygon filling algorithm, raster graphics, in-depth un...

多边形扫描转换通过实现光栅图形学经典的多边形填充算法，深入理解光栅图形学的原理。

Polygon scan conversion raster graphics through the realization of the classic polygon filling algorithm, raster graphics, in-depth understanding of the principle.

详细说明：多边形扫描转换通过实现光栅图形学经典的多边形填充算法，深入理解光栅图形学的原理。

In this paper, the flow of raster to vector conversion of engineering drawing was introduced.

本文在介绍工程图样矢量转换过程的基础上，详细描述了光栅图元的交互提取和矢量图形的光栅化方法

TE mode diffraction characteristics of surface-relief grating having different symmetrical profiles (rectangular, sinusoidal, triangle, trapezoidal profile) are calculated with rigorous second order vector couple-wave theory, the law of diffraction efficiency as a function of grating groove depth are analyzed: in a specific condition, diffraction efficiency might be close to 100%.

本论文采用严格的二阶矢量耦合波理论计算了矩形、正弦、三角形、梯形等对称面形蚀刻光栅的TE模偏振的衍射特性，分析了光栅的衍射效率随着沟槽深度变化规律。

The damage possibility due to the redeposition layer was ruled out by acid-etching the grating's front surface.

为了判断光栅前表面的损伤原因，在第二轮实验中对光栅前表面进行酸蚀处理以消除抛光再沉积层的影响。

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。