期刊
RESULTS IN PHYSICS
卷 31, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.rinp.2021.105031
关键词
Digital holographic microscopy; DHM; Common optical path; Interferometer; Spatial frequency spectrum; Quantitative phase image
资金
- Ministry of Science and Technology, Taiwan [MOST 108-2221-E-005-054-MY2]
The proposed common-path off-axis interferometric system eliminates zero-order artifacts and increases the phase image quality by compounding multi-angle holograms. The high-quality quantitative phase imaging maintains imaging frame rate while revealing more detailed cell structures.
We propose a simple common-path off-axis interferometric system to perform high-quality quantitative phase imaging based on a rotatable birefringent prism that is placed at the output port of a conventional transmission or reflection microscope. The proposed system effectively eliminates the zero-order term of holographic data and increases the phase image reconstruction bandwidth by compounding multi-angle holograms, thereby obtaining high-quality quantitative phase images without zero-order artifacts. In addition, the proposed multi-angle phase image compounding method can eliminate the repetitive object phases caused by self-reference interferometry, thereby alleviating the problem of field-of-view reduction. Furthermore, we realize high-quality quantitative phase imaging based on multi-angle phase images without sacrificing the imaging frame rate. The concept is demonstrated by performing high-quality quantitative phase imaging of polystyrene microspheres and a freshwater alga, Pinnularia. Experimental results show that the noise level of the quantitative phase images synthesized using the proposed rotatable common-path digital holographic microscopy system is lower than that of conventional single-shot digital holographic microscope reconstruction quantitative images, and a more detailed cell internal structure can be observed.
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