结构扭扰引起定向光束能量扩散的统计特征

 受到特定振动环境干扰的光机系统结构存在着多个转动自由度的扭扰分量，由此引起输出光束定向角的偏转抖动，导致光束辐射能量集中度以动态扩散形式下降。运用概率和统计的方法对有代表性的光束随机抖动测试结果进行了二元统计分析。基于实际抖动幅度分布趋近于正态规律的特点，从辐射累积效应角度探讨了定向光束在受光面能量沉积的分布特征以及能量扩散程度的近似评估方法。

Statistics characteristic of energy diffusion of directional beam with torsion disturbances of the mechanism

There are torsion components of multi rotation degree of freedom in the optics mechanism system disturbed by specifically environment of vibration. The disturbances induce deflection jitter of directional angle of the beam emitted by the system, result in the centralization degree of radiant energy falling in dynamic spread form. With adopting means of probability and statistics, the representative testing result of the beam random jittering is analyzed by dualistic statistics. On the basis that factual amplitude distribution of jitter is close to characteristic of the normal law, it is discussed from cumulative radiant effects the distribution characteristic of energy deposition on the radiated surface by directional beam and the approximate evaluation means about energy diffusion extent of the beam.