CAJ | 학술논문

空间相机反射镜尺寸和质量对系统的光学性能、机械性能和热稳定性等具有重要影响,因此对其进行轻量化设计具有重要意义.文中从材料的选择、背部基体形状、轻量化孔形式、支撑方式对某空间大口径反射镜进行了详细的结构设计,采用理论论述与有限元分析相结合的方法,提出了一种背部开放式、三角形孔的轻量化结构形式,通过合理设计反射镜支撑点数目和位置,使反射镜组件在重力工况下,镜面面形精度达到成像质量要求,即PV值不大于63.2 nm.
공간상궤반사경척촌화질량대계통적광학성능、궤계성능화열은정성등구유중요영향,인차대기진행경양화설계구유중요의의.문중종재료적선택、배부기체형상、경양화공형식、지탱방식대모공간대구경반사경진행료상세적결구설계,채용이론논술여유한원분석상결합적방법,제출료일충배부개방식、삼각형공적경양화결구형식,통과합리설계반사경지탱점수목화위치,사반사경조건재중력공황하,경면면형정도체도성상질량요구,즉PV치불대우63.2 nm.
In order to reduce the influence of the mass and sizes of mirrors on the quality of space camera, such as optics quality, mechanics quality and stability of thermal dimension of structure, the necessity of lightweight for mirrors was introduced. Material selection, substratum' s back shape, lightweight pattern and support pattern were taken into account in the design of large-aperture mirror in space camera. A new design with open bottom, triangular aperture was proposed based on theoretical and finite element analysis. Through the rational design of support structure parameters, the surface accuracy of mirror meets the needs of the imaging quality (PV≤63.2 nm) under environment of gravity.