optical path difference

With turning, the alignment error of concave sphere center and axis of rotation makes optical path difference alter, so interference fringes will change from bright to hidden.

凹球面支撑轴旋转时，球心与旋转轴线的对准误差导致两反射光光程差变化，使干涉条纹移动。

The normalized optical path difference sensitivity of the low temperature section is 271.162nm/(℃? cm), it is slightly smaller than the normalized optical path difference sensitivity high temperature section. And it has good linearity and repeatability. 3.

低温段的归一化光程差灵敏度为271.162nm/（℃？cm），较高温段的归一化的光程差温度灵敏度略小，且具有良好的线性和重复性。

The principle of them is the same. It is that changing optical path difference of interferometric light by filling liquid so that can change the output spectrum and calculate the refractive index of liquid by detecting the change of the stripe peaks.

它们的原理本质上是相同的，就是通过加入液体改变相干光的光程差，从而改变输出光谱，通过检测输出光谱的峰值变化，计算液体折射率。

With the compensator in place any optical path difference arises from the actual path difference.

有了补偿板之后,任何光程差都只由实际程差引起.

The stability of micro-birefringence optical path difference measuring system based on electro-optic modulation method is studied.

提出用旋转半波片 - 反射法测量半封闭玻璃制品应力,探讨以电光调制法为基础的微双折射光程差测量系统的稳定性.

We can get current optical path difference or pulse delay from the spectrum graph directly.

即通过采样的光谱图,可以得到当前状态下的脉冲延时.