Development of Wide-field Optical Multi-band Polarimeter and Promoting SGMAP Project

2016 Fiscal Year Final Research Report

• Project/Area Number: 26287031
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Hiroshima University
• Principal Investigator: KAWABATA KOJI 広島大学, 宇宙科学センター, 准教授 (60372702)
• Co-Investigator(Renkei-kenkyūsha): YOSHIDA Michitoshi 広島大学, 宇宙科学センター, 教授 (90270446) ; UEMURA Makoto 広島大学, 宇宙科学センター, 准教授 (50403514) ; AKITAYA Hiroshi 広島大学, 宇宙科学センター, 特任助教 (60450186)
• Research Collaborator: MATSUMURA Masafumi 香川大学, 教育学部, 教授
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 可視赤外線天文学 / 銀河磁場 / 偏光測定 / ナノテクノロジー

Outline of Final Research Achievements

For a realization of the project of optical polarimetry survey in northern hemisphere, we designed the main optical train of the wide-field, multi-cand optical polarimeter, and designed and/or fabricated the key optical components of . To realize `wide-field' and `high precision polarimety' simultaneously, the wave plates and the polarizing beam splitters should have (i) large dimensions, (ii) large acceptance of the incidence angle and (iii) wide wavelength coverage. In this study, for the half-wave plate, we successfully designed a Pancharatnum-type one which satisfies the required condition. For the polarizing beam splitter, we fabricated a small test peace and then a large, 110mm by 110mm ones and confirmed that they have good performance. With these results, the feasibility of the wide-field polarimeter for SGMAP has been promised.

Free Research Field

可視赤外線天文学