用连续相位扫描进行振动定量分析

Phase Continue Scanning ESPI Technique for Measuring Vibration Mode

利用光学连续相位扫描和正弦相位调制相结合 ,提出一种 ESPI时间平均测振的定量分析方法。由于采用光学连续相位扫描 ,该方法具有较强的抗环境干扰能力 ,不需要精确校准光学相移器 ,并且能自动定量地给出物体的全场振幅分布。

In this paper, the phase continue scan is combined with the sinusoidal phase modulation to determine the vibration amplitude of object by time average ESPI. Because the phase continue scan technique is adopted, this method has the advantage of a high anti disturbance capability without exactly calibrating the optical phase shifter.