2018 Fiscal Year Final Research Report
Fast and high-resolution imaging method by fast phase-shifting self-interference digital holography
| Project/Area Number |
16K04970
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Optical engineering, Photon science
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| Research Institution | Saitama University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | インコヒーレントディジタルホログラフィ / 位相シフト法 / 一般化位相シフト法 / 連続フリンジスキャン / 正規化 / 光計測 |
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| Outline of Final Research Achievements |
A fast and high-resolution self-interference incoherent digital holography system was developed using a fast phase-shifting method with a continuous fringe scanning scheme. Randomly phase-shifted holograms created by the self-interference of wavefront diffracted from objects illuminated by the incoherent light source were analyzed by a generalized phase-shifting method. The normalized generalized phase-shifting method using hologram normalization was porposed. The conditions for high-speed phase-shifting are verified. The resolution power and the processing speed of the incoherent digital holographysystem were evaluated. The effectiveness of the proposed incoherent digital holography system was demonstrated by optical experiments for micro objects.
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| Free Research Field |
応用光学
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| Academic Significance and Societal Importance of the Research Achievements |
提案手法は光学的手法による高速高分解能イメージングを実現している．インコヒーレント光源の使用や位相シフタとカメラの同期が不要で高速処理が可能であるという特徴は簡単かつ安価なシステム構築を可能とし，DHシステムの実用化に大きく貢献する．正規化一般化位相シフト法は一般的なディジタルホログラフィや干渉計測に適用可能であり精密計測や変位計側へ応用することができる．提案システムは生きた細胞を対象とする生体イメージングや医療創薬材料の評価などに応用することができる．
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