High contrast internal and external coronagraph masks produced by various techniques

Kunjithapatham Balasubramanian; Daniel Wilson; Victor White; Richard Muller; Matthew Dickie; Karl Yee; Ronald Ruiz; Stuart Shaklan; Eric Cady; Brian Kern; Ruslan Belikov; Olivier Guyon; N. Jeremy Kasdin

doi:10.1117/12.2024615

26 September 2013 High contrast internal and external coronagraph masks produced by various techniques

Kunjithapatham Balasubramanian, Daniel Wilson, Victor White, Richard Muller, Matthew Dickie, Karl Yee, Ronald Ruiz, Stuart Shaklan, Eric Cady, Brian Kern, Ruslan Belikov, Olivier Guyon, N. Jeremy Kasdin

Author Affiliations +

Proceedings Volume 8864, Techniques and Instrumentation for Detection of Exoplanets VI; 88641R (2013) https://doi.org/10.1117/12.2024615
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

High contrast internal and external coronagraphic imaging requires a variety of masks depending on different architectures to suppress star light. Various fabrication technologies are required to address a wide range of needs including gradient amplitude transmission, tunable phase profiles, ultra-low reflectivity, precise small scale features, and low-chromaticity. We present the approaches employed at JPL to produce pupil plane and image plane coronagraph masks, and lab-scale external occulter type masks by various techniques including electron beam, ion beam, deep reactive ion etching, and black silicon technologies with illustrative examples of each. Further development is in progress to produce circular masks of various kinds for obscured aperture telescopes.

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Kunjithapatham Balasubramanian, Daniel Wilson, Victor White, Richard Muller, Matthew Dickie, Karl Yee, Ronald Ruiz, Stuart Shaklan, Eric Cady, Brian Kern, Ruslan Belikov, Olivier Guyon, and N. Jeremy Kasdin "High contrast internal and external coronagraph masks produced by various techniques ", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 88641R (26 September 2013); https://doi.org/10.1117/12.2024615

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