Prime Focus Spectrograph - Subaru's future

Hajime Sugai, Hiroshi Karoji, Naruhisa Takato, Naoyuki Tamura, Atsushi Shimono, Youichi Ohyama, Akitoshi Ueda, Hung Hsu Ling, Marcio Vital De Arruda, Robert H. Barkhouser, Charles L. Bennett, Steve Bickerton, David F. Braun, Robin J. Bruno, Michael A. Carr, João Batista De Carvalho Oliveira, Yin Chang Chang, Hsin Yo Chen, Richard G. Dekany, Tania Pereira DominiciRichard S. Ellis, Charles D. Fisher, James E. Gunn, Timothy M. Heckman, Paul T.P. Ho, Yen Shan Hu, Marc Jaquet, Jennifer Karr, Masahiko Kimura, Olivier Le Fèvre, David Le Mignant, Craig Loomis, Robert H. Lupton, Fabrice Madec, Lucas Souza Marrara, Laurent Martin, Hitoshi Murayama, Antonio Cesar De Oliveira, Claudia Mendes De Oliveira, Ligia Souza De Oliveira, Joe D. Orndorff, Rodrigo De Paiva Vilaça, Vanessa Bawden De Paula Macanhan, Eric Prieto, Jesulino Bispo Dos Santos, Michael D. Seiffert, Stephen A. Smee, Roger M. Smith, Laerte Sodré, David N. Spergel, Christian Surace, Sebastien Vives, Shiang Yu Wang, Chi Hung Yan

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

41 Scopus citations


The Prime Focus Spectrograph (PFS) of the Subaru Measurement of Images and Redshifts (SuMIRe) project has been endorsed by Japanese community as one of the main future instruments of the Subaru 8.2-meter telescope at Mauna Kea, Hawaii. This optical/near-infrared multi-fiber spectrograph targets cosmology with galaxy surveys, Galactic archaeology, and studies of galaxy/AGN evolution. Taking advantage of Subaru's wide field of view, which is further extended with the recently completed Wide Field Corrector, PFS will enable us to carry out multi-fiber spectroscopy of 2400 targets within 1.3 degree diameter. A microlens is attached at each fiber entrance for F-ratio transformation into a larger one so that difficulties of spectrograph design are eased. Fibers are accurately placed onto target positions by positioners, each of which consists of two stages of piezo-electric rotary motors, through iterations by using back-illuminated fiber position measurements with a wide-field metrology camera. Fibers then carry light to a set of four identical fast-Schmidt spectrographs with three color arms each: the wavelength ranges from 0.38 ́m to 1.3 ́m will be simultaneously observed with an average resolving power of 3000. Before and during the era of extremely large telescopes, PFS will provide the unique capability of obtaining spectra of 2400 cosmological/astrophysical targets simultaneously with an 8-10 meter class telescope. The PFS collaboration, led by IPMU, consists of USP/LNA in Brazil, Caltech/JPL, Princeton, & JHU in USA, LAM in France, ASIAA in Taiwan, and NAOJ/Subaru.

Original languageEnglish (US)
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy IV
StatePublished - 2012
EventGround-Based and Airborne Instrumentation for Astronomy IV - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Publication series

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


OtherGround-Based and Airborne Instrumentation for Astronomy IV

All Science Journal Classification (ASJC) codes

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


  • Fiber positioner
  • Microlens
  • Multi-fiber spectroscopy
  • Optical/near-infrared
  • Prime Focus Spectrograph (PFS)
  • Schmidt spectrograph
  • Subaru telescope
  • Wide field corrector


Dive into the research topics of 'Prime Focus Spectrograph - Subaru's future'. Together they form a unique fingerprint.

Cite this