Reflectivity and optical surface height requirements in a broadband coronagraph. 1. Contrast floor due to controllable spatial frequencies.
作者： Stuart B. Shaklan , Joseph J. Green
DOI: 10.1364/AO.45.005143
关键词: Deformable mirror 、 Broadband 、 Optics 、 Coronagraph 、 Wavefront 、 Michelson interferometer 、 Bandwidth (signal processing) 、 Spatial frequency 、 Physics 、 Telescope
摘要: We derive the broadband contrast floor in a coronagraphic telescope having nonideal optical surfaces. consider only fundamental spatial frequencies within control bandwidth of coronagraph's deformable mirror. Cross terms arising from beating beyond mirror will be considered second paper. Two wavefront systems are analyzed:a zero-path difference Michelson interferometer with two mirrors at pupil image, and sequential pair one placed image. requirements on surface figure reflectivity uniformity for both cases.
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