Laboratory Testing of a Lyot Coronagraph Equipped with an Eighth‐Order Notch Filter Image Mask | Zendy

Justin R. Crepp | Zendy; Jian Ge | Zendy; Andrew D. Vanden Heuvel | Zendy; Shane P. Miller | Zendy; Marc J. Kuchner | Zendy

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Laboratory Testing of a Lyot Coronagraph Equipped with an Eighth‐Order Notch Filter Image Mask

Author(s) -

Justin R. Crepp,

Jian Ge,

Andrew D. Vanden Heuvel,

Shane P. Miller,

Marc J. Kuchner

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/504977

Subject(s) - coronagraph , optics , monochromatic color , focus (optics) , tilt (camera) , filter (signal processing) , physics , band stop filter , contrast (vision) , exoplanet , spatial filter , adaptive optics , planet , computer science , computer vision , astronomy , low pass filter , engineering , mechanical engineering

We have built a series of notch filter image masks that make the Lyotcoronagraph less susceptible to low-spatial-frequency optical aberrations. Inthis paper, we present experimental results of their performance in the labusing monochromatic light. Our tests show that these ``eighth-order'' masks areresistant to tilt and focus alignment errors, and can generate contrast levelsof 2 x 10^-6 at 3 lambda/D and 6 x 10^-7 at 10 lambda/D without the use ofcorrective optics such as deformable mirrors. This work supports recenttheoretical studies suggesting that eighth-order masks can provide theTerrestrial Planet Finder Coronagraph with a large search area, high off-axisthroughput, and a practical requisite pointing accuracy.Comment: Accepted to ApJ. 16 pages, 7 figures, Contact jcrepp@astro.ufl.edu for high resolution image

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