焦圆

The rays go through a series of convolutions called the conoid of Sturm.Midway between the two focal lines , the rays form a circlecalled the circle of least confusion.

7光线经过一系列的聚散形成 Sturm 光锥，在两条焦线之间，光线形成一个圆斑，称为最小弥散圆。

And then the point spread function can be acquired through Abel reverse transform, according to the circular symmetry characteristic of the defocused image.

由于离焦造成的图像模糊是圆对称的，对线扩散函数进行阿贝尔逆变换就得到了点扩散函数。

3D seismic migration algorithms of holding circular symmetry ;2. Assuming that the point spread function is circular symmetry and considering that the image is actually complex conjugate symmetry in frequency domain, authors establish a new cost function in frequency domain.

算法假设退化系统的点扩散函数具有圆对称性，并考虑图像的频域具有复共轭对称性，在频域里建立了新的优化判据；采用共轭梯度算法搜索判据，从而在有实际物理意义的区域中收敛于最优解；对光学成像系统常见的离焦、衍射模糊问题进行了仿真；用该算法实现了其退化图像的恢复，给出并分析了结果。

Product Instructions: Enhanced VMS series of optical image measuring instrument was an enhanced 2D optical image measuring instrument which bring out by our company. Using high-resolution color Sony CCD camera and the United States NAVITAR Zoom Lens and With our company's Manual version of self-developed measurement software MCINS .This tester have the basic measurement functions of point, line, circle, distance, angle etc .and multi-axis functions which are ableing to meet the basic needs of the secondary element measurement. In addition, measurement data can be input EXCEL, WORD, TXT or output the measurement graphics to the DXF document to make CAD designs.

增强型VMS系列光学影像测量仪，是我公司推出的一款增强型2D光学影像测量仪，采用高分辨率日本索尼彩色CCD摄像机和美国NAVITAR变焦物镜，采用我公司自主研发的MCINS手动版测量软件，具备基本的点、线、圆、距离、角度等基本测量功能及多坐标功能，能满足基本的二次元测量需求；此外测量数据可输入EXCEL、WORD、TXT中或者将测量图形输出至DXF文档做CAD设计。

The diffraction distributions of Gaussian beam limited by the circular apertures with different sizes in scanning objectives focal plane were studied, and then the effective spot radius in focal plane was calculated using second moment and compared with the ideal one. The influence of apertures with different sizes on resolution was analyzed.

在不同孔径圆孔的限制下，对扫描物镜焦面上的衍射光场分布进行数值计算，并利用二阶矩统计的方法对焦面上的等效光斑半径进行数值计算，将其与不受限时的理想情况进行对比，分析孔径尺度对激光束扫描系统分辨率的影响。

Bumer of this type is favorable for primary air-coal flow ignition and flame stability, as well as low Nox emissions. Flue gas re-circulation is employed to prevent furnace slagging and opposed-fired burner arrangement is capable of reducing residual swirl of furnace exit flue gas.

该炉燃烧器有利于煤粉气流的着火和火焰稳定；低Nox燃烧，有利于环保；与烟气再循环配合有利于防止炉膛结焦；前后墙布置切圆燃烧方式减少了炉膛出口气流的残余旋转，使水平烟道烟气流速分布更趋均匀。

The edge of a circle, rendered as a raster image, may look smooth initially, but eventually as you zoom in you will see a jagged stairstep edge of the individual square pixels that make u p the image.

缘圆，一译作栅格图像，看似平稳最初但最终你会见到你在凹凸不平变焦阶梯广场边缘的象素使美国个别磷的形象。

The edge of a circle, rendered as a raster image, may look smooth initially, but eventually as you zoom in you will see a jagged stairstep edge of the individual square pixels that make up the image.

缘圆，一译作栅格图像，看似平稳最初但最终你会见到你在凹凸不平变焦阶梯广场边缘像素，弥补了个人的形象。

It consists of 11 elements in 9 groups and uses an Aspherical lens element to correct aberration for excellent image quality throughout the zoom range and a circular aperture for exquisite rendering of out-of-focus backgrounds.

它由11片9组，并使用了非球面镜片，以纠正像差优秀的图像质量在整个变焦范围和圆孔的精致呈现失焦的背景。

A calibration target,made up of double feature circle of co-plane,was attached on the airplane′s rudder.

用共面的两个特征圆组成一标定靶固定在飞行器舵面上，用一台定焦数码摄像机对标定靶拍照，获得特征圆数字图像。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。