Development of an eight-octant phase-mask coronagraph for theSubaru Telescope and future space tescope missions

2012 Fiscal Year Final Research Report

• Project/Area Number: 23740139
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: Hokkaido University
• Principal Investigator: MURAKAMI Naoshi 北海道大学, 大学院・工学研究院, 助教 (80450188)
• Project Period (FY): 2011 – 2012
• Keywords: 光赤外線天文学 / 量子光工学 / 惑〓探査

Research Abstract

An eight-octant phase mask (8OPM) coronagraph for the SubaruTelescope has been developed for direct detection of extrasolar planets. First,pupil-shaping lenses were manufactured to maximize the achievable performance of the8OPM coronagraph for the Subaru Telescope. An 8OPM optimized for the 1.6μm observational band was also designed and manufactured based on photonic crystal technology. It is expected that the photonic crystal masks will be useful not onlyfor ground-based observations but also for future space-based planet-finding missions In addition, a coronagraphic wavefront sensor for accurately measuring low-order wavefront aberrations was developed.

Research Products

• [Journal Article] Achromatic design of thevector vortex coronagraph (2013)
  • Author(s): N. Murakami, S. Hamaguchi, M. Sakamoto, R. Fukumoto, A. Ise, K. Oka, N. Baba, M. Tamura
  • Journal Title: Optics Express Volume: 21巻 Pages: 7400-7410
  • DOI: DOI:10.1364/OE.21.007400
  • Peer Reviewed
• [Journal Article] Coronagraph focal-plane phase masks bason photonic crystal technology: recent on photonic crystal technology: recent progress and observational strategy (2012)
  • Author(s): N. Murakami, J. Nishikawa, W. A. Traub,D. P. Mawet, D. C. Moody, B. D. Kern,J. T. Trauger, E. Serabyn, S. Hamaguchi, F.Oshiyama, M. Sakamoto, A. Ise, K. Oka, N. Baba, H. Murakami, M. Tamura
  • Journal Title: Proceedings of SPIE Volume: 8442巻 Pages: 844205
  • DOI: DOI:10.1117/12.925613
• [Journal Article] Taking the vector vortex coronagraph tthe next level for ground- and space-basedexoplanet imaging instruments: review oftechnology developments in the USA, Japan,and Europe (2011)
  • Author(s): D. Mawet, N. Murakami
  • Journal Title: Proceedings of the SPIE Volume: 8151巻 Pages: 815108
  • DOI: DOI:10.1117/12.896059
• [Presentation] すばる望遠鏡搭載に向けた8分割位相マスクコロナグラフの開発 (2012)
  • Author(s): 村上尚史,平翼,馬場直志,O.Guyon,F.Martinache,西川淳,田村元秀,松尾太郎
  • Organizer: 日本天文学会2012年秋季年会
  • Place of Presentation: 大分大学(大分県)
  • Year and Date: 2012-09-19
• [Presentation] Coronagraphfocal-plane phase masks based onphotonic crystal technology: recentprogress and observational strategy (2012)
  • Author(s): N. Murakami
  • Organizer: SPIE Conference: Astronomical Telescopes + Instrumentation
  • Place of Presentation: Amsterdam RAI Convention Center (Netherland)
  • Year and Date: 2012-07-01
• [Presentation] High Contrast Imaging Testbed (HCIT)を用いた8分割フォトニック結晶マスクコロナグラフの実証実験 (2011)
  • Author(s): 村上尚史,西川淳,W. Traub,D. Mawet,D. Moody,B. Kern,J Trauger,E. Serabyn,田村元秀,馬場直志,村上浩
  • Organizer: 日本天文学会2011年秋季年会
  • Place of Presentation: 鹿児島大学(鹿児島県)
  • Year and Date: 2011-09-20
• [Presentation] Taking the vector vortex coronagraphto the next level for ground- and space-based exoplanet imaging instruments: review of technology developments in the USA, Japan, and Europe (2011)
  • Author(s): D. Mawet, N. Murakami
  • Organizer: SPIE Conference: 2011Optics + Photonics
  • Place of Presentation: San Diego Convention Center(米国)
  • Year and Date: 2011-08-23