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

• 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
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2011: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 光赤外線天文学 / 量子光工学 / 惑〓探査 / 応用光学・量子光工学 / 惑星探査

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] Design and laboratory demonstration of an achromatic vector vortex coronagraph (2013)
  • Author(s): N. Murakami, S. Hamaguchi, M. Sakamoto, R. Fukumoto, A. Ise, K. Oka, N. Baba, and M. Tamura
  • Journal Title: Opt. Express Volume: Vol. 21 Issue: 6 Pages: 7400-7410
  • DOI: 10.1364/oe.21.007400
  • NAID: 120005228743
  • Peer Reviewed
• [Journal Article] Coronagraph focal-plane phase masks based on photonic crystal technology: recent progress and observational strategy (2012)
  • Author(s): N. Murakami et al.
  • Journal Title: Proc. SPIE Volume: 8442 Pages: 844205-844205
  • DOI: 10.1117/12.925613
  • Peer Reviewed
• [Journal Article] Taking the vector vortex coronagraph to the next level for ground-and space-based exoplanet imaging instruments : review of technology developments in the USA, Japan, and Europe(Invited paper) (2011)
  • Author(s): D. Mawet, et al.(43人中28番目にJ. Nishikawa, 36番目にM. Tamura)
  • Journal Title: Proc. of the Society of Photo-Optical Instrumentation Engineers Volume: 8151 Pages: 815108-815108
  • DOI: 10.1117/12.896059
  • Peer Reviewed
• [Presentation] フォトニック結晶技術による焦点面マスクコロナグラフ装置の開発 (2013)
  • Author(s): 村上尚史
  • Organizer: 2012年度 国立天文台研究集会「将来装置による地球型系外惑星直接検出および撮像」
  • Place of Presentation: 国立天文台（東京都）
  • Invited
• [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] Recent Progress in High-Contrast Imaging Experiments using Focal-Plane Coronagraph Masks (2012)
  • Author(s): N. Murakami
  • Organizer: 第8回系外惑星大研究会
  • Place of Presentation: ニューフジヤホテル（静岡県）
  • Invited
• [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
  • Organizer: 日本天文学会2012年秋季年会
  • Place of Presentation: 大分大学（大分県）
• [Presentation] 2チャンネル型光渦コロナグラフを利用した偏光差分法の提案 (2012)
  • Author(s): 濱口翔喜
  • Organizer: 日本天文学会2012年秋季年会
  • Place of Presentation: 大分大学（大分県）
• [Presentation] Coronagraph focal-plane phase masks based on photonic crystal technology: recent progress and observational strategy (2012)
  • Author(s): N. Murakami
  • Organizer: SPIE Conference: Astronomical Telescopes + Instrumentation
  • Place of Presentation: Amsterdam RAI Convention Center (Netherland)
• [Presentation] 8分割位相マスクコロナグラフを用いた角度差分撮像モードの検討 (2012)
  • Author(s): 押山史佳，村上尚史，馬場直志，田村元秀
  • Organizer: 日本天文学会2012年春季年会
  • Place of Presentation: 龍谷大学（京都市）
• [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
• [Presentation] Taking the vector vortex coronagraph to 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, 他41名
  • Organizer: SPIE Conference: 2011 Optics + Photonics(招待講演)
  • Place of Presentation: San Diego Convention Center (USA)
• [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，Wesley A. Traub，Dimitri Mawet，Dwight C. Moody，Brian D. Kern，John T. Trauger，Eugene 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（鹿児島市）
• [Presentation] 2チャンネル型光渦コロナグラフの実証実験 (2011)
  • Author(s): 濱口翔喜，村上尚史，坂本盛嗣，伊勢明敏，岡和彦，馬場直志，田村元秀
  • Organizer: 日本天文学会 2011年秋季年会
  • Place of Presentation: 鹿児島大学（鹿児島市）
• [Presentation] Speckle decorrelationを利用した高コントラスト偏光観測法の提案 (2011)
  • Author(s): 村上尚史，濱口翔喜，馬場直志，田村元秀
  • Organizer: 日本天文学会 2011年秋季年会
  • Place of Presentation: 鹿児島大学（鹿児島市）