POLARBEAR-2 optical and polarimeter designs

Tomotake Matsumura, Peter Ade, Kam Arnold, Darcy Barron, Julian Borrill, Scott Chapman, Yuji Chinone, Matt Dobbs, Josquin Errard, Giullo Fabbian, Adnan Ghribi, William Grainger, Nils Halverson, Masaya Hasegawa, Kaori Hattori, Masashi Hazumi, William L. Holzapfel, Yuki Inoue, Sou Ishii, Yuta KanekoBrian Keating, Zigmund Kermish, Nobuhiro Kimura, Ted Kisner, William Kranz, Adrian T. Lee, Frederick Matsuda, Hideki Morii, Michael J. Myers, Haruki Nishino, Takahiro Okamura, Erin Quealy, Christian Reichardtc, Paul L. Richards, Darin Rosen, Colin Ross, Akie Shimizu, Michael Sholl, Praween Siritanasak, Peter Smith, Nathan Stebor, Radek Stompor, Aritoki Suzuki, Jun Ichi Suzuki, Suguru Takada, Ken Ichi Tanaka, Takayuki Tomaru, Oliver Zahn

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations


POLARBEAR-2 is a ground based cosmic microwave background (CMB) radiation experiment observing from Atacama, Chile. The science goals of POLARBEAR-2 are to measure the CMB polarization signals originating from the inflationary gravity-wave background and weak gravitational lensing. In order to achieve these science goals, POLARBEAR-2 employs 7588 polarization sensitive transition edge sensor bolometers at observing frequencies of 95 and 150 GHz with 5.5 and 3.5 arcmin beam width, respectively. The telescope is the off-axis Gregorian, Huan Tran Telescope, on which the POLARBEAR-1 receiver is currently mounted. The polarimetry is based on modulation of the polarized signal using a rotating half-wave plate and the rotation of the sky. We present the developments of the optical and polarimeter designs including the cryogenically cooled refractive optics that achieve the overall 4 degrees field-of-view, the thermal filter design, the broadband anti-reflection coating, and the rotating half-wave plate.

Original languageEnglish
Title of host publicationMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
StatePublished - 2012
EventMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI - Amsterdam, Netherlands
Duration: 3 Jul 20126 Jul 2012

Publication series

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


ConferenceMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI


  • Cosmic microwave background radiation
  • Millimeter wave
  • Polarimetry
  • Polarization


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