讨论了管长为189.5 mm，时间分辨率为5 ps的条纹变像管工作在多狭缝情况下对目标物体进行探测时栅极开关脉冲对其成像性能的影响.开关脉冲的上升或者下降前沿都会降低条纹管的时间分辨和空间分辨性能，特别是空间分辨能力下降得很明显,当栅极电压波动10%,条纹管空间分辨能力将下降为原来的一半.产生影响的主要原因是栅极电压的变化使得条纹变像管的最佳成像面位置也发生了变化而偏离了原来位置，偏离得越多对条纹像管性能参量影响就越大.所以在栅极开关脉冲发生电路中应该严格控制产生脉冲的前沿和后沿宽度，降低其对条纹变像管成像性能的影响.

Based on a 5.0 ps time resolved streak tube with length of 189.472 mm, the influence of grid gated impulse on the characters of the streak tube was discussed. It is found that the rising edge and falling edge of the gated impulse would deteriorate both temporal and spatial resolution capabilities of the streak tube. The spatial resolution may fall sharply to half when the voltage on grid has a fluctuation of 10%. The main cause for the destructive influence is that optimal imaging position shifts when the voltage on grid changes. Influence on temporal and spatial resolution would reinforce as the deviation of voltage on grid increases. In conclusion, the rising and falling edge of gated impulse on grid gated impulse should be controlled strictly in narrow to reduce the impairment on the streak tube.