Microfabricated pinholes for high contrast imaging testbeds

Emory L. Jenkins; Kyle Van Gorkom; Kevin Derby; Patrick Ingraham; Ewan S. Douglas

doi:10.1117/12.2677630

5 October 2023 Microfabricated pinholes for high contrast imaging testbeds

Emory L. Jenkins, Kyle Van Gorkom, Kevin Derby, Patrick Ingraham, Ewan S. Douglas

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126801A (2023) https://doi.org/10.1117/12.2677630
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

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.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Emory L. Jenkins, Kyle Van Gorkom, Kevin Derby, Patrick Ingraham, and 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

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