To compensate of the nonlinearity error of heterodyne interferometers in nanometer measurement, a method for reducing the first harmonic nonlinearity is proposed.

为了补偿激光外差干涉纳米测量中的非线性误差，提出了一种减小非线性误差的一次谐波方法。

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Based on the measurement of the contact Angle of differently treated ITO, the surface energy and polarity were calculated using the harmonic mean method.

在测量ito接触角的基础上，应用调和平均法计算了不同表面处理ITO阳极的表面能和极性度。

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Harmonic measure method is the key of the measurement. In this paper, the harmonic measure method which based on the multiple frequency rotate transform theory is researched and analyzed.

谐波测量方法是谐波测量的核心环节，本文对基于倍频旋转变换理论的谐波测量方法进行了研究分析。

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