Abstract
In order to solve the problem of low sampling rate and to meet the requirements of high frequency swing mirror measurement, based on the principle of equivalent sampling, a multi time series high accuracy non-contact swing mirror detection system is designed. First, with the laser pulse control circuit, multi time sequence flashing laser lighting is achieved and the spot position is obtained on the CCD target plane. Then, according to the image of the laser spot position, calculate the mirror swing angle and angular velocity by the time interval between adjacent spot positions. The experimental results show that the angle resolution of the detection system is 0.005°. The time resolution can reach the microsecond order, and the angular velocity measurement error is less than ±7%. The system improves the sampling frequency of swing mirror measuring and meets the requirements of high frequency swing mirror test.
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