一种电视成像系统动态传递函数的快速测量方法

Dynamic Transfer Function Measurement of Television Imaging System

为了研究平台振动与电视成像系统传递函数之间的关系,提出了一种电视成像系统动态传递函数快速测量方法。通过将压电陶瓷带动的快速反射镜系统引入I-SITE测量系统光路中的方法,实现了对不同振动环境下电视成像系统传递函数的快速测量。通过测量发现,平台低频振动时,随着频率的增加,电视成像系统动态传递函数下降速度比静止时增加了10.1%-41.2%;平台高频振动时,随着频率的增加电视成像系统动态传递函数下降速度比静止时增加了42%。

A dynamic transfer function of television imaging system was designed in order to study the dynamic transfer function of television imaging system affected by vibration. The dynamic transfer function was measured by putting the fast-steering mirror（ FSM） which drove by a piezoelectric ceramic into I-SITE comprehensive measurement system. The experiment data show that the downtrend of the dynamic transfer function is increasing 10. 1% - 41. 2% compared with static condition with the increasing frequency of vibration and then begins to fall in the low vibrating condition and the downtrend of the transfer function is fluctuating increasing 41. 2% compared with static condition with the increasing frequency of vibration and then changes slowly in the high vibrating condition.