大口径光学元件重力变形补偿的设计分析

Design and analysis of compensation of large aperture optical element for gravity deformation

根据弹性板壳理论,建立了大口径光学元件的几种理论模型。提出了一种补偿大口径光学元件重力变形的方法,该方法通过在透镜镜框边缘施加作用力,使透镜产生与重力变形反向的挠性变形,抵消重力变形的影响。建立了带镜框的大口径透镜的分析模型,证明了通过优化施加力的大小和支撑点位置使透镜产生挠性变形的方法能有效消除重力变形的影响。

According to elastic shell theory,several kinds of theoretical models of large aperture optical elements were established.A compensation method for the gravity deformation from a large aperture optical element was presented.With the method,the torque was applied at the edge of a lens frame to generate flexible deformation to offset the gravity deformation.An analysis model of the large aperture optical element with the frame was proposed,and it proves that the flexible deformation of optical element can effectively eliminate the influence of gravity deformation on the optical cell through optimizing the magnitude of force and the positions of support points.