An innovative integral field unit upgrade with 3D-printed micro-lenses for the RHEA at Subaru

Theodoros Anagnos, Pascal Maier, Philipp Hottinger, Christopher H. Betters, Tobias Feger, Sergio G. Leon-Saval, Itandehui Gris-Sanchez, Stephanos Yerolatsitis, Julien Lozi, Tim A. Birks, Sebastien Vievard, Nemanja Jovanovic, Adam D. Rains, Michael J. Ireland, Robert J. Harris, Blaise C. Kuo Tiong, Olivier Guyon, Barnaby Norris, Sebastiaan Y. Haffert, Matthias BlaicherYulin Xu, Moritz Straub, Jörg Uwe Pott, Oliver Sawodny, Philip L. Neureuther, David W. Coutts, Christian Schwab, Christian Koos, Andreas Quirrenbach

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


In the new era of Extremely Large Telescopes (ELTs) currently under construction, challenging requirements drive spectrograph designs towards techniques that efficiently use a facility's light collection power. Operating in the single-mode (SM) regime, close to the diffraction limit, reduces the footprint of the instrument compared to a conventional high-resolving power spectrograph. The custom built injection fiber system with 3D-printed microlenses on top of it for the replicable high-resolution exoplanet and asteroseismology spectrograph (RHEA) at Subaru in combination with extreme adaptive optics of SCExAO, proved its high efficiency in a lab environment, manifesting up to ∼77% of the theoretical predicted performance.

Original languageEnglish
Title of host publicationAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV
EditorsRamon Navarro, Roland Geyl
ISBN (Electronic)9781510636897
Publication statusE-pub ahead of print - 13 Dec 2020
EventAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV 2020 - Virtual, Online, USA United States
Duration: 14 Dec 202022 Dec 2020

Publication series

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


ConferenceAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV 2020
CountryUSA United States
CityVirtual, Online


  • astrophotonics
  • diffraction-limited spectrograph
  • fiber injection
  • integral field unit
  • micro-lenslets
  • optical fibers
  • radial velocity
  • SCExAO
  • spectroscopy

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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