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Ren YX, Wu J, Lai QTK, Lai HM, Siu DMD, Wu W, Wong KKY, Tsia KK. Parallelized volumetric fluorescence microscopy with a reconfigurable coded incoherent light-sheet array. LIGHT, SCIENCE & APPLICATIONS 2020; 9:8. [PMID: 31993126 PMCID: PMC6971027 DOI: 10.1038/s41377-020-0245-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 12/23/2019] [Accepted: 01/06/2020] [Indexed: 05/12/2023]
Abstract
Parallelized fluorescence imaging has been a long-standing pursuit that can address the unmet need for a comprehensive three-dimensional (3D) visualization of dynamical biological processes with minimal photodamage. However, the available approaches are limited to incomplete parallelization in only two dimensions or sparse sampling in three dimensions. We hereby develop a novel fluorescence imaging approach, called coded light-sheet array microscopy (CLAM), which allows complete parallelized 3D imaging without mechanical scanning. Harnessing the concept of an "infinity mirror", CLAM generates a light-sheet array with controllable sheet density and degree of coherence. Thus, CLAM circumvents the common complications of multiple coherent light-sheet generation in terms of dedicated wavefront engineering and mechanical dithering/scanning. Moreover, the encoding of multiplexed optical sections in CLAM allows the synchronous capture of all sectioned images within the imaged volume. We demonstrate the utility of CLAM in different imaging scenarios, including a light-scattering medium, an optically cleared tissue, and microparticles in fluidic flow. CLAM can maximize the signal-to-noise ratio and the spatial duty cycle, and also provides a further reduction in photobleaching compared to the major scanning-based 3D imaging systems. The flexible implementation of CLAM regarding both hardware and software ensures compatibility with any light-sheet imaging modality and could thus be instrumental in a multitude of areas in biological research.
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Affiliation(s)
- Yu-Xuan Ren
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR 999077 China
| | - Jianglai Wu
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR 999077 China
- Department of Physics, University of California, Berkeley, CA 94720 USA
| | - Queenie T. K. Lai
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR 999077 China
| | - Hei Ming Lai
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR 999077 China
- Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, SAR 999077 China
| | - Dickson M. D. Siu
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR 999077 China
| | - Wutian Wu
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR 999077 China
- GHM Institute of CNS Regeneration, Jinan University, 601 Huangpu Avenue West, Guangzhou, 510632 China
- Re-Stem Biotechnology, Suzhou, 215007 China
| | - Kenneth K. Y. Wong
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR 999077 China
| | - Kevin K. Tsia
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR 999077 China
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Mohan K, Tyagi A, Mondal PP. Note: Multi-sheet light enables optical interference lithography. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:066106. [PMID: 29960546 DOI: 10.1063/1.5022499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We propose and demonstrate a modified spatial filter-based single-shot lithography technique for fabricating an array of microfluidic channels. This is achieved by illuminating the photopolymer specimen with a multiple light sheet (MLS) pattern. Modified spatial filtering is employed in a cylindrical lens system to generate the MLS pattern. The transmission window [the difference (α - β) angle] of the spatial filter determines the characteristics of the pattern and the fabricated microfluidic channel array. After exposing to a negative photoresist (DPHPA monomer with rose bengal as the photoinitiator), this gives rise to an array of micro-fluidic channels (post development process). We studied the effect of micro-channel geometry (channel width, inter-channel separation, and aspect ratio) for varying exposure times that show near-linear dependence. The results show that the fabricated array has 7 prominent channels with an individual channel width and inter-channel separation of approximately 5 μm and 12 μm, respectively. The proposed technique enables selective plane patterning and reduces the overall cost for large-scale production.
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Affiliation(s)
- Kavya Mohan
- Nanobioimaging Laboratory, Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012, India
| | - Ayush Tyagi
- Department of Physics, Indian Institute of Science and Education, Mohali, India
| | - Partha Pratim Mondal
- Nanobioimaging Laboratory, Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012, India
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Golub I, Chebbi B, Golub J. Toward the optical "magic carpet": reducing the divergence of a light sheet below the diffraction limit. OPTICS LETTERS 2015; 40:5121-4. [PMID: 26512534 DOI: 10.1364/ol.40.005121] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In 3D, diffraction-free or Bessel beams are well known and have found applications in diverse fields. An analog in 2D, or pseudonondiffracting (PND) beams, is a nontrivial problem, and existing methods suffer from deficiencies. For example, Airy beams are not highly localized, some PND beams have significant side lobes, and a cosine beam has to be truncated by a very narrow aperture thus discarding most of the energy. We show, both theoretically and experimentally, that it is possible to generate a quasi-nondiffracting 2D light beam in a simple and efficient fashion. This is achieved by placing a mask consisting of a pair of double slits on a cylindrical lens. The applications include light sheet microscopy/optical sectioning and particle manipulation.
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