Flexible method for generating needle-shaped beams and its application in optical coherence tomography.
Flexible method for generating needle-shaped beams and its application in optical coherence tomography.
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DOI:
10.1364/optica.456894
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发表时间:
2022-08-20
期刊:
影响因子:
10.4
通讯作者:
中科院分区:
文献类型:
--
作者:
Needle-shaped beams (NBs) featuring a long depth-of-focus (DOF) can drastically improve the resolution of microscopy systems. However, thus far, the implementation of a specific NB has been onerous due to the lack of a common, flexible generation method. Here we develop a spatially multiplexed phase pattern that creates many axially closely spaced foci as a universal platform for customizing various NBs, allowing flexible manipulations of beam length and diameter, uniform axial intensity, and sub-diffraction-limit beams. NBs designed via this method successfully extended the DOF of our optical coherence tomography (OCT) system. It revealed clear individual epidermal cells of the entire human epidermis, fine structures of human dermal-epidermal junction in a large depth range, and a high-resolution dynamic heartbeat of alive Drosophila larvae.
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