次世代遙測衛星酬載光機結構設計與分析

Design and Analysis of A TMA Telescope for Next Generation Earth Observation Satellite

為自主研發高解析度遙測取像儀器，並執行次世代衛星遙測酬載系統技術研發，國研院儀科中心於105年度，開始進行離軸式三反射鏡光學系統設計及光機結構分析，截至目前為止，已獲得相當重要技術能量與經驗。本研究整合光學設計與光機分析技術，進行次世代遙測衛星酬載光機結構之靜態強度及動態剛性分析，預估光機結構所承受之自重變形與應力分布，並求取自然頻率與模態振形，以評估整體光機結構性能，研究過程並探討自重變形導致光學鏡片對成像品質之影響，為後續系統組裝工程綜合分析，使光學系統影像達成最佳設計值。 Three mirror anastigmatic(TMA) telescope provides a better solution to meet the requirements of high resolution and wide swath, it has become one of candidate to be next generation observation payload for satellite. This article reports on design, analysis, assembly and implementation of a TMA telescope for next earth observation satellite. A straightforward approach is presented that integrated finite element method and Zernike polynomials fitting techniques is found to successfully predict optical performance. Furthermore, an optomechanical structure of TMA optical system was confi gured which is implemented to verify the present.