Development of binary band-limited coronagraph masks for extremely high contrast imaging of extrasolar planets with Terrestrial Planet Finder

Justin Crepp; Jian Ge; John H. Debes; Marc J. Kuchner

doi:10.1117/12.552396

12 October 2004 Development of binary band-limited coronagraph masks for extremely high contrast imaging of extrasolar planets with Terrestrial Planet Finder

Justin Crepp, Jian Ge, John H. Debes, Marc J. Kuchner

Author Affiliations +

Proceedings Volume 5487, Optical, Infrared, and Millimeter Space Telescopes; (2004) https://doi.org/10.1117/12.552396
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

We report progress on development of a new generation of binary band-limited coronagraphic image masks at Penn State for extremely high contrast imaging of extrasolar planets with future visible Terrestrial Planet Finder (TPF). The masks are being precisely fabricated with a state-of-the-art E-beam lithographer using ~20 nm precision and are capable of achieving contrasts of 10^-9 with high throughput (> 40%) and close inner working distance (3 λ/D). A prototype with 250 nm precision has allowed us to reach ~10^-6 contrast at 8 λ/D and 10^-5 at 3 λ/D with ~27% throughput (Debes et al. 2004).

Citation Download Citation

Justin Crepp, Jian Ge, John H. Debes, and Marc J. Kuchner "Development of binary band-limited coronagraph masks for extremely high contrast imaging of extrasolar planets with Terrestrial Planet Finder", Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); https://doi.org/10.1117/12.552396

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