2023 Fiscal Year Final Research Report
Principles for the development of an ultra-thin imaging system by the spectral encoding
| Project/Area Number |
21H01385
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 21060:Electron device and electronic equipment-related
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| Research Institution | University of Toyama |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
大嶋 佑介 富山大学, 学術研究部工学系, 准教授 (10586639)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 光ファイバ / 内視鏡 / コンピュテーショナルイメージング / スペクトル符号化 |
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| Outline of Final Research Achievements |
We evaluated the optical performance of single-fiber imaging based on spectral coding and clarified the conditions and mechanisms necessary to achieve resolution superior to conventional methods. The encoder was fabricated by fusion-splicing a multimode fiber with a core diameter of 105 microns and a length of 4 cm to a multicore fiber with seven cores. Using the fabricated encoder, a resolution of 223 LW/PH was achieved. At an operating distance of 7 mm or more, it became pan-focus, enabling video imaging of fluorescent images. On the other hand, at short operating distances, it exhibited optical sectioning characteristics.
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| Free Research Field |
光ファイバ応用技術
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で得られた知見は，現在のイメージセンサで実現されている画素サイズ1ミクロンを下回る細径撮像デバイスの開発において有用な学術基盤を提供するだけでなく, 回折限界以下の画素サイズの実現可能性を示唆しており，高い学術的意義を有している．応用先として，低侵襲な脳神経系の観察や，血管，細気管支内を観察する医用内視鏡をはじめ，ポーラス構造を持つ材料の内部観察，モーター内部や高集積エレクトロニクス内部など狭小空間内の画像センサ等，広範な波及効果を有する．
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