2022 Fiscal Year Final Research Report
Picometer positioning control in air by ultra-high resolution displacement measurement and drive system
Project/Area Number |
20H02042
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 18020:Manufacturing and production engineering-related
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Research Institution | Nagaoka University of Technology |
Principal Investigator |
AKETGAWA MASATO 長岡技術科学大学, 工学研究科, 教授 (10231854)
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | 干渉計 / ステップ変位 / 超安定ステージ / ノイズフロア / pm / 環境要因 |
Outline of Final Research Achievements |
Two types of laser interferometers (heterodyne and sinusoidal phase modulation) complying with metre standards, their phase meters and a stage combining ultra-stable parallel spring guidance and piezoelectric elements were developed. As a result, mechanical step displacements of 10-20 pm were observed with both interferometer systems. The noise floor was also measured and it was found that the noise density was below 1 pm/root (Hz) in the high frequency range (1~MHz) and that the lower the frequency (0.01~1Hz), the greater the influence of air fluctuations at lower frequencies. However, the observation of pm step displacements, which was initially aimed for, was not achieved. This is a future challenge for this study.
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Free Research Field |
精密工学
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Academic Significance and Societal Importance of the Research Achievements |
学術的意義は次のとおりである。1)2種の干渉計(ヘテロダイン・正弦波位相変調)用の高精度(0.1mrad以下の分解能を有する)位相計を高速高精度AD変換器を有するField Programmable Gate Arrayで開発したこと、2)これらと超安定平行バネ圧電素子ステージ及び環境隔離チャンバーの採用により最小10pmの力学的ステップ変位を観察したこと、3)2種干渉計のノイズフロアを観察したこと、である。ただしpmステップ変位の観察には至っていないが、何がこれを阻害しているかの大まかな推論はたてられた。社会的意義としては、10pmステップ変位が実際に実現観察可能であることを示した点である。
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