Microfabricated pinholes for high contrast imaging testbeds

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Author
Jenkins, E.L.
van Gorkom, K.
Derby, K.
Ingraham, P.
Douglas, E.S.
Affiliation
James C. Wyant College of Optical Sciences, University of Arizona
Department of Astronomy and Steward Observatory, University of Arizona
Issue Date
2023-10-05
Keywords
Coronagraphy
high contrast imaging
microfabrication
pinhole
spatial filter

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Publisher
SPIE
Citation
Emory L. Jenkins, Kyle Van Gorkom, Kevin Derby, Patrick Ingraham, Ewan S. Douglas, "Microfabricated pinholes for high contrast imaging testbeds," Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126801A (5 October 2023); https://doi.org/10.1117/12.2677630
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Rights
© 2023 SPIE. (2023) Published by SPIE.
Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
Abstract
In order to reach contrast ratios of 10−8 and beyond, coronagraph testbeds need source optics that reliably emulate nearly-point-like starlight, with microfabricated pinholes being a compelling solution. To verify, a physical optics model of the Space Coronagraph Optical Bench (SCoOB) source optics, including a finite-difference time-domain (FDTD) pinhole simulation, was created. The results of the FDTD simulation show waveguide-like behavior of pinholes. We designed and fabricated microfabricated pinholes for SCoOB made from an aluminum overcoated silicon nitride film overhanging a silicon wafer substrate, and report characterization of the completed pinholes. © 2023 SPIE.
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Immediate access
ISSN
0277-786X
ISBN
978-151066574-3
DOI
10.1117/12.2677630
Version
Final Published Version
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