两极 1.(地球的两极) the two poles of the earth; north and south poles 两极地区 polar regions2.[物理学] (阴阳极) the two poles; both positive and negative electrodes; anode and cathode3.(两个极端; 两个对立面) polarization; division into two opposing extremes4.(分成两极) polarize; produce a polarization of; 两极分化 polarization; 两极关系 bipolar relationship; 两极轨道 polar orbit; 两极化 polarization; 两极性 bipolarity
As the plates are made larger and the distance between them diminished, the fringing becomes relatively less . 若板的面积增大,而两极间的间距缩小,则边缘相应就较小。
Some electro - optical crystals can result in birefringency when they are pressed by electric field , by controlling the intensity of the electric field , we can change the phase of the output optical beam , so the desired scanning direction can be got 它主要是利用某些电光晶体在电场的作用下,可以产生双折射的原理,通过控制加在光学相控阵中各相控单元两极间的电场强度,可以改变出射光的相位,从而得到所需角度的扫描。