Deriving telescope Wavefront Error (WFE) stability error budget from coronagraph performance

H. Philip Stahl; Bijan Nemati; Mark T. Stahl

doi:10.1117/12.2562818

13 December 2020 Deriving telescope Wavefront Error (WFE) stability error budget from coronagraph performance

H. Philip Stahl, Bijan Nemati, Mark T. Stahl

Proceedings Volume 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX; 114502Z (2020) https://doi.org/10.1117/12.2562818
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

Missions to directly detect exoplanets with a coronagraph, such as the potential Habitable Exoplanet (HabEx) mission, require an optical telescope with extreme wavefront stability. The key systems engineering question is: ‘How stable?’ The poetic answer is 10 picometers per 10 minutes. But, what is the actual spatial distribution of this error allocation? This paper defines a science-driven systems-engineering process to derive the telescope’s wavefront stability error budget specification from the coronagraph’s performance; reviews previous studies into coronagraph sensitivity to wavefront error instability; and demonstrates the method by comparing the performance of coronagraph telescope combinations.

Conference Presentation

Citation Download Citation

H. Philip Stahl, Bijan Nemati, and Mark T. Stahl "Deriving telescope Wavefront Error (WFE) stability error budget from coronagraph performance", Proc. SPIE 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX, 114502Z (13 December 2020); https://doi.org/10.1117/12.2562818

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