| Project/Area Number |
26289015
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Production engineering/Processing studies
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
AKETAGAWA MASATO 長岡技術科学大学, 工学(系)研究科(研究院), 教授 (10231854)
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| Co-Investigator(Kenkyū-buntansha) |
平田 研二 長岡技術科学大学, 工学(系)研究科(研究院), 准教授 (40314364)
韋 冬 長岡技術科学大学, 工学(系)研究科(研究院), 助教 (70610418)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
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| Keywords | 多色法 / 周波数安定化 / 飽和吸収線 / 正弦波周波数変調 / 正弦波位相変調 / 変位計測 / 絶対長さ測定 / 原子分子の飽和吸収線 / 正弦波周波数変調法 / 空気屈折率補正 / 空気屈折率測定 / 絶対長さ / FSR / 共鳴周波数 / ２色法 / 空気屈折率 |
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| Outline of Final Research Achievements |
Using sinusoidal frequency/phase modulation, central frequencies of laser diodes (LDs) are locked to saturated absorption lines of Iodine(633nm) and Rubidium(780nm). Relative frequency stabilities for 633nm and 780nm are 10^-11 and 10^-10 orders respectively. These LDs are used for light sources of displacement measuring interferometers. From the harmonic signals, which are contained in the interference signals, the Lissajous diagram can be drawn. From the diagram, the displacements of the target mirrors in the interferometers can be determined with the uncertainties of several nm - 10nm. From the above results, the possibility to perform multiple-color absolute length determination.
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