This phenomenon coincides with Bragg equation and the law of refraction.

这一现象与布拉格方程和折射定律所得结果一致。

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The formulas for strain quantity and fringe spacing on the basis of Bragg equation are derived. The relationship between fringe deformation and internal flaws is analysed.

本文利用轮胎受荷前后表面反射光波的干涉原理，从布喇格方程出发，导出了干涉条纹间距与变形量的关系式，分析了内部缺陷与条纹畸变的关系。

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Firstly, basic transmission equation of transmitted light is given using coupled-mode theory in Fiber Bragg Gratings and physics meaning of every parameter is given.

本文第一部分运用耦合模理论推导了在光纤光栅中传播的光的基本传输方程以及给出各个参数的物理意义。

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