亮环

与未经包覆SiO2的纳米CaCO3的暗场像作对比，可以看出经过SiO2包覆的纳米CaCO3粒子周围有一白色亮环，从而得到SiO2包覆层的暗场照片。

Compared with the dark field image of the non-cladding nano-CaCO_3 , a white halo could be observed around the SiO_2-cladding nanoCaCO_3 , thus a dark field photo of the SiO_2-cladding layer was obtained .

运用耦合功率理论中的功率耦合系数方程，算得2n个亮环与相应LP0n模间的2n个功率耦合系数，将之相加得到总的功率耦合系数。

Using the power coupling coefficient equations of coupled power theory , the total power coupling coefficient between the 2n bright loops and corresponding LP_ ( 0n ) modes was obtained .

但根据耦合模扩散理论，与LP0n模对应的一组亮环最邻近的2n个亮环所携带的功率能耦合进LP0n模，被纤芯吸收。

But according to coupled modes diffusion theory , 2n bright loops that are adjacent to the n bright loops corresponding LP_ ( 0n ) modes will couple into LP_ ( 0n ) modes , then be absorbed .

核仁周围的亮环越来越小，直至基本消失；

The light rings of the nucleoli become smaller gradually and disappear nearly at last .

典型反射镜头的环状光圈导致失焦影像呈现明显的“亮环”效应。

The annular aperture of typical mirror lenses results in out-of-focus images with a pronounced'bright ring'effect .

本图中，这种“亮环”效应导致背景上尖顶的影像变成了两个。

In this case , the'bright ring'results in a double image of the spire in the background .

因此，环绕着中央点将会有整整一系列同心亮环和暗环。

Accordingly , a whole series of concentric bright and dark rings will surround the central spot .

结果表明：在新的扰动磁场作用下，原冕流底部的物质将受到压缩并向上运动，形成高密度亮环结构，在环的下方出现低密度暗腔；

The numerical results showed that the material contained originally in the streamer is compressed and lifted upward by the new erupting magnetic field , forming a high density bright loop , and a dark resign with low density come out below it .

计算结果表明，从亮环图中第一个亮环和第七至第十个亮环的一个的直径求中央干涉级小数部分的误差较小。

The formula to calculate the errors shows that the focal length of the camera lens for taking the interferogram should be long and the diameters of first bright fringe and one of seventh to tenth bright fringes should be measured to make the errors of a smaller .