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Microelectromechanical deformable mirror development for high-contrast imaging, part 1: miniaturized, flight-capable control electronics

Bendek, Eduardo and Ruane, Garreth and Prada, Camilo Mejia and Mendillo, Christopher B. and Riggs, A. J. Eldorado and Serabyn, Eugene (2020) Microelectromechanical deformable mirror development for high-contrast imaging, part 1: miniaturized, flight-capable control electronics. Journal of Astronomical Telescopes, Instruments, and Systems, 6 (4). Art. No. 045001. ISSN 2329-4124. https://resolver.caltech.edu/CaltechAUTHORS:20201013-104709820

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Abstract

Deformable mirrors (DMs) are a critical technology to enable coronagraphic direct imaging of exoplanets with current and planned ground- and space-based telescopes as well as future mission concepts, such as the Habitable Exoplanet Observatory and the Large UV/Optical/IR Surveyor. The latter concepts aim to image exoplanet types ranging from gas giants to Earth analogs. This places several requirements on the DMs such as requires a large actuator count (≳3000), fine surface height resolution (≲10  pm), and radiation hardened driving electronics with low mass and volume. We present the design and testing of a flight-capable, miniaturized DM controller. Having achieved contrasts on the order of 5  ×  10⁻⁹ on a coronagraph testbed in vacuum in the high contrast imaging testbed facility at NASA’s Jet Propulsion Laboratory (JPL), we demonstrate that the electronics are capable of meeting the requirements of future coronagraph-equipped space telescopes. We also report on functionality testing on-board the high-altitude balloon experiment “Planetary Imaging Concept Testbed Using a Recoverable Experiment – Coronagraph,” which aims to directly image debris disks and exozodiacal dust around nearby stars. The controller is designed for the Boston Micromachines Corporation Kilo-DM and is readily scalable to larger DM formats. The three main components of the system (the DM, driving electronics, and mechanical and heat management) are designed to be compact and have low-power consumption to enable its use not only on exoplanet missions, but also in a wide-range of applications that require precision optical systems, such as direct line-of-sight laser communications. The controller is capable of handling 1024 actuators with 220 V maximum dynamic range, 16-bit resolution, 14-bit accuracy, and 1 kHz operating frequency. The system fits in a 10  ×  10  ×  5  cm³ volume, weighs <0.5  kg, and consumes <8  W. We have developed a turnkey solution reducing the risk for future missions, lowering their cost by significantly reducing volume, weight, and power consumption of the wavefront control hardware.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/1.JATIS.6.4.045001DOIArticle
https://www.spiedigitallibrary.org/journals/Journal-of-Astronomical-Telescopes-Instruments-and-Systems/volume-6/issue-04/045001/Microelectromechanical-deformable-mirror-development-for-high-contrast-imaging-part-1/10.1117/1.JATIS.6.4.045001.full?SSO=1PublisherArticle
ORCID:
AuthorORCID
Bendek, Eduardo0000-0002-9408-8925
Ruane, Garreth0000-0003-4769-1665
Riggs, A. J. Eldorado0000-0002-0863-6228
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper 20031 received Mar. 31, 2020; accepted for publication Sep. 22, 2020; published online Oct. 7, 2020. The design and development of the first unit was funded by a NASA Ames Research Center Innovation Fund (CIF). The flight units were funded by NASA headquarters as PICTURE-C subaward to NASA Ames Research Center. The last unit was procured by JPL, and its performance characterization was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords:instrumentation; exoplanets; direct detection; coronagraphs; deformable mirrors; control electronics
Issue or Number:4
Record Number:CaltechAUTHORS:20201013-104709820
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20201013-104709820
Official Citation:Eduardo A. Bendek, Garreth J. Ruane, Camilo Mejia Prada, Christopher B. Mendillo, A.J. Eldorado Riggs, and Eugene Serabyn "Microelectromechanical deformable mirror development for high-contrast imaging, part 1: miniaturized, flight-capable control electronics," Journal of Astronomical Telescopes, Instruments, and Systems 6(4), 045001 (7 October 2020). https://doi.org/10.1117/1.JATIS.6.4.045001
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106021
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Oct 2020 18:03
Last Modified:13 Oct 2020 18:03

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