Error Analysis of Exposure Time Measurement in Ultra High Speed Framing Camera

Based on the control principle for exposure time of the ultra high speed framing camera, we examined the errors in the measurement of the gating time using a CCD to record the time-delay produced by the ultra-fast laser pulse and the fiber array, from pserpectives of the fiber cutting precision and laser precise synchronization, and presented a specific value.We offered a comprehensive analysis of the effect resulting from these two aspects for measuring the gating time of the ultra high speed framing camera, and then proposed some technical measures to reduce the error.The results show that the errors caused by the fiber cutting precision and laser precise synchronization are in picosecond scale, which is negligible for the gating time measurement of a nanosecond camera.Finally, we used this method to measure the gating time of the ultra high speed camera.The measured results show good agreement with the normal values, which verifies the effectiveness of this method.