Demonstration of coronagraph technology for high-contrast point spectroscopy of ExoEarths
Coronagraph
DOI:
10.1117/12.2676876
Publication Date:
2023-10-05T17:43:56Z
AUTHORS (13)
ABSTRACT
The planned Habitable Worlds Observatory (HWO) will be designed to find and characterize Earth-like planets in the habitable zones of sun-like stars. This mission require an instrument capable making measurements planet spectra at high contrast small inner working angles. Previous demonstrations existing coronagraph designs have not achieved these requirements 20% bandwidths or better required for full spectroscopic characterization, even a laboratory environment. One technique that shows promise improving bandwidth is allocation Deformable Mirror (DM) degrees freedom improve by relaxing on size coronagraph's focal plane correction region, Dark Zone (DZ). In this work, we provide details results demonstration wide-band NASA's High-Contrast Imaging Testbed (HCIT) Jet Propulsion Laboratory (JPL). We show D-shaped region one half can corrected 4×10<sup>−10</sup> using simple Lyot with two DMs. also future plans further reducing dark just light coupled into single-mode fiber plane.
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