2014 Fiscal Year Final Research Report
Observation of phase transition using optical birefringence of imaging system
| Project/Area Number |
25600133
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
General applied physics
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| Research Institution | Kagoshima University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MIURA Yoko 鈴鹿工業高等専門学校, 教養教育科, 准教授 (20456643)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 複屈折 / 構造相転移 / 磁気相転移 / イメージング技術 |
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| Outline of Final Research Achievements |
This study is observation of the optical birefringence of imaging system as a function of temperature of several optical crystals. In CaF2, we expect no birefringence at 20-500 K but the artifact signals derived from optical windows of cryostat were observed. We developed that the intrinsic signals were obtained subtracting from the artifact ones. As a result, we can observed low retardation much rather than the conventional method. Simultaneously, the temperature dependence of azimuth angles were observed.
On the other hand, to observe the retardation lager than half of the wave length (the theoretical limit), we observed the three kinds of wave length (523nm, 543 nm, 575 nm) at the same time, and then the composite photograph can shows the large retardation imaging data beyond the theoretical limit.
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| Free Research Field |
低次元磁性体
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