A novel lightweight Fizeau infrared interferometric imaging system

Douglas A. Hope, Michael Hart, Steve Warner, Oli Durney, Robert Romeo

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

1 Scopus citations

Abstract

Aperture synthesis imaging techniques using an interferometer provide a means to achieve imagery with spatial resolution equivalent to a conventional filled aperture telescope at a significantly reduced size, weight and cost, an important implication for air- and space-borne persistent observing platforms. These concepts have been realized in SIRII (Space-based IR-imaging interferometer), a new light-weight, compact SWIR and MWIR imaging interferometer designed for space-based surveillance. The sensor design is configured as a six-element Fizeau interferometer; it is scalable, light-weight, and uses structural components and main optics made of carbon fiber replicated polymer (CFRP) that are easy to fabricate and inexpensive. A three-element prototype of the SIRII imager has been constructed. The optics, detectors, and interferometric signal processing principles draw on experience developed in ground-based astronomical applications designed to yield the highest sensitivity and resolution with cost-effective optical solutions. SIRII is being designed for technical intelligence from geo-stationary orbit. It has an instantaneous 6 × 6 mrad FOV and the ability to rapidly scan a 6 × 6 deg FOV, with a minimal SNR. The interferometric design can be scaled to larger equivalent filled aperture, while minimizing weight and costs when compared to a filled aperture telescope with equivalent resolution. This scalability in SIRII allows it address a range of IR-imaging scenarios.

Original languageEnglish (US)
Title of host publicationSensors and Systems for Space Applications IX
EditorsGenshe Chen, Khanh D. Pham
PublisherSPIE
ISBN (Electronic)9781510600799
DOIs
StatePublished - Jan 1 2016
Externally publishedYes
EventSensors and Systems for Space Applications IX - Baltimore, United States
Duration: Apr 18 2016Apr 19 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9838
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSensors and Systems for Space Applications IX
CountryUnited States
CityBaltimore
Period4/18/164/19/16

Keywords

  • Earth science
  • Imaging
  • Interferometer
  • IR infrared
  • IR infrared surveillance
  • Near earth object identification
  • Persistence surveillance
  • Threat warning

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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  • Cite this

    Hope, D. A., Hart, M., Warner, S., Durney, O., & Romeo, R. (2016). A novel lightweight Fizeau infrared interferometric imaging system. In G. Chen, & K. D. Pham (Eds.), Sensors and Systems for Space Applications IX [983806] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9838). SPIE. https://doi.org/10.1117/12.2223426