通常光学相位延迟测量方法都采用单一波长的光进行测量, 无法准确反映延迟量随波长的变化。文章提出了一种简便的相位延迟谱的测量方法, 该方法利用平面偏振测量仪, 通过旋转待测元件并测量系统的透射光谱, 进而按照原理算法解算出相位延迟谱。实验结果表明, 该方法具有很好的重复性, 操作简便, 测量结果的重复性可以保持在0.41°以内。

Usual optical phase retardance measurement methods use a single wavelength of light for measurement, which cannot accurately reflect the variation of retardance amount with wavelength. A simple method for measuring phase retardance spectrum is proposed. The method uses plane polarimeter to measure the transmission spectrum of the system by rotating the component to be measured, and then solves the phase retardance spectrum according to the principle algorithm. The experimental results show that this method has good repeatability and simple operation, and the repeatability of the measurement results can be kept within 0.41°.