Finite element analysis on mounting configurations for large- aperture optical element

摘要

Large-aperture optical element is widely used in optical engineering and reasonable mounting results in higher performance. In order to reduce the gravitational sag induced by its own weight, three types of mounting configurations were proposed and simulated by finite element method, and the effects of axial loads and non-uniformity and asymmetry were analyzed in the same time. The results showed that full periphery mounting configuration was the optimal mounting configuration and the optimal axial load was 0.085MPa with the corresponding maximum distortion was 2.32μm, and the effects of non-uniformity and asymmetry on distortion were small.