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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。
The structure of the opto-mechanical system that is disturbed by a specific vibration environment has a plurality of torsional components of rotational degrees of freedom, thereby causing deflection jitter of the directional angle of the output beam, resulting in a decrease in the concentration of the radiation energy of the optical beam in a dynamic diffusion manner. Using the method of probability and statistics, a binary statistical analysis of the representative beam random jitter test results was carried out. Based on the characteristics of the actual jitter amplitude distribution close to the normal law, the distribution characteristics of the energy deposition of the directional light beam on the light-receiving surface and the approximate assessment of the degree of energy diffusion are discussed from the perspective of radiation cumulative effect.