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提出一种可以从时域和空域两个方面更准确地表征光束指向稳定性的动态方法,解决大型光学系统中光学器件微振动对光学系统的影响的描述问题。基于实际应用中机械结构的模态分析及微振动对光束的影响,将机械模态和光学系统有机地结合起来,建立了光学器件微振动模型。然后以神光Ⅱ装置中的空间滤波器为研究对象,分析了空间滤波器出射光角度的时间分布和空间分布。
A dynamic method that can characterize the beam pointing stability more accurately in both time and space domains is proposed to solve the problem of describing the influence of optical vibration on the optical system in large optical systems. Based on the modal analysis of the mechanical structure and the influence of the micro vibration on the light beam, the mechanical modal and the optical system are organically combined to establish the micro vibration model of the optical device. Then, taking the spatial filter in SG-II device as the research object, the temporal distribution and spatial distribution of the exit angle of the spatial filter are analyzed.