Stressed deformable reflector design and pneumatic membrane antenna for cryogenic thermal vacuum chamber testing

Marcos Esparza, Heejoo Choi, Hyukmo Kang, Christian d’Aubigny, Amarjiit Pandde, Henry Quach, Aman Chandra, Karlene Karfalt, Yuzuru Takashima, Art Palisoc, Jonathan W. Arenberg, Kristy Gogick Marshall, Christopher S. Glynn, Sean M. Godinez, Marcos Tafoya, Brandon Chalifoux, Christopher Walker, Daewook Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Deformable reflector technology has mainly been used for observations at visible and infrared wavelengths but has yet to be utilized for terahertz wavefront correction. We present an actuator for deformable reflectors that overcomes challenges particular to this wavelength such as a millimeter-scale stroke requirement. Bending moment actuators are used in both the radial and tangential directions to correct low-order wavefront aberrations. Strong and flexible materials such as Delrin are used for the reflector material. Such a deformable antenna can be used to correct wavefronts on future large radio antennae such as the Orbiting Astronomical Satellite for Investigating Stellar Systems (OASIS). This antenna uses a 20-meter thin membrane as its primary radio wave collector. A deformable reflector may be added to this system to allow for looser tolerances on the primary antenna shape and correct for wavefront errors inherent in an inflatable optic. To predict the wavefront errors that may be expected when using this type of thin membrane primary reflector, TVAC (Thermal Vacuum Chamber) test methods are also presented in these proceedings.

Original languageEnglish (US)
Title of host publicationAstronomical Optics
Subtitle of host publicationDesign, Manufacture, and Test of Space and Ground Systems III
EditorsTony B. Hull, Daewook Kim, Pascal Hallibert, Fanny Keller
PublisherSPIE
ISBN (Electronic)9781510644786
DOIs
StatePublished - 2021
EventAstronomical Optics: Design, Manufacture, and Test of Space and Ground Systems III 2021 - San Diego, United States
Duration: Aug 1 2021Aug 5 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11820
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceAstronomical Optics: Design, Manufacture, and Test of Space and Ground Systems III 2021
Country/TerritoryUnited States
CitySan Diego
Period8/1/218/5/21

Keywords

  • Bending moment actuator
  • Deformable antenna
  • Membrane antenna
  • Optomechanical design
  • Radio astronomy
  • TVAC

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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