Highly replicable, low-cost, portable, general-purpose, high-resolution spectrometer with applications in stellar studies and exoplanet science

Clark Baker, Guillem Anglada-Escude, Hugh Jones, Bill Martin

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

1 Citation (Scopus)
78 Downloads (Pure)

Abstract

High-resolution spectrometers have proven to be an important tool for astronomical observations and continue to have an ever expanding set of applications, such as high resolution IFS (Integral Field Spectroscopy). With this in mind, we present an alternative approach to the design and construction of Echelle type spectrometers. The usual approach is to drive high resolving power through the use of large gratings and long focal length collimators, leading to great production costs in the order of $1,000,000. Our compact, proof-of-concept prototype, via the coupling of adaptive optics, achieves comparable performance and resolution; with a theoretical resolving power R<80,000 in the Vis-NIR regime (500nm-1μm) at a cost <$10,000. This is attained through the use of COTS (Commercially-Off-The-Shelf) and economically designed components. The overall device footprint is compact, measuring the size of a â€shoe-box', approximately 30cm×15cm. The spectrometer prototype is fibre-fed with a single 10μm fibre and follows a double-pass design-Applying a custom designed, 108.24mm focal length, collimating and re-focussing lens. The system follows an Echelle type design with high resolution achieved through the use of a compact R4 diffraction grating and a prism as the cross-disperser.

Original languageEnglish
Title of host publicationProceedings Volume 11117, Techniques and Instrumentation for Detection of Exoplanets IX
EditorsStuart B. Shaklan
PublisherSPIE (International Society for Optics and Phonotics)
ISBN (Electronic)9781510629271
DOIs
Publication statusPublished - 9 Sept 2019
EventSPIE Optical Engineering + Applications - San Diego Convention Center, San Diego, United States
Duration: 11 Aug 201915 Aug 2019
https://spie.org/conferences-and-exhibitions/optics-and-photonics/optical-engineering--applications?SSO=1

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11117
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSPIE Optical Engineering + Applications
Country/TerritoryUnited States
CitySan Diego
Period11/08/1915/08/19
Internet address

Keywords

  • Echelle
  • Exoplanet
  • High-resolution
  • Integral field
  • Low-cost
  • Replicable
  • Spectrograph
  • Spectroscopy

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