这种方法先根据波导口尺寸利用惠更斯原理计算出各模式的辐射场的分布；
The far-field radiation pattern of the open-end rectangular waveguide was measured and the complex coefficients of each mode were determined by this method.
麦克斯韦方程组：洛仑兹力，平面电磁波，辐射，光波，反射，折射，惠更斯原理，衍射，干涉现象。
Maxwell equations: Lorentz force, plane electromagnetic waves, radiation, light waves, reflexion, refraction, Huyghens principle, diffraction, interference phenomena.
从波动光学的角度，用惠更斯原理解释了光的折射现象，根据惠更斯原理所作的折射光线进行简化，得出较为简单的作图方法。
From the Angle of wave motion optics, on the principle of Huyghens, explaining the light of refraction. Simplifying the picture of the light of refraction and then getting a simple drawing method.
从波动光学的角度，用惠更斯原理解释了光的折射现象，根据惠更斯原理所作的折射光线进行简化，得出较为简单的作图方法。
From the Angle of wave motion optics, on the principle of Huyghens, explaining the light of refraction. Simplifying the picture of the light of refraction and then getting a simple drawing method.
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