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Kanno H, Mikami H, Goda K. High-speed single-pixel imaging by frequency-time-division multiplexing. OPTICS LETTERS 2020; 45:2339-2342. [PMID: 32287228 DOI: 10.1364/ol.390345] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 03/12/2020] [Indexed: 06/11/2023]
Abstract
We propose and experimentally demonstrate high-speed single-pixel imaging by integrating frequency-division multiplexing and time-division multiplexing (techniques used widely in telecommunications) and applying the combined technique, namely, frequency-time-division multiplexing (FTDM), to optical imaging. Specifically, FTDM single-pixel imaging uses an array of broadband, spatially distributed, dual-frequency combs (i.e., spatial dual combs) for multidimensional illumination and detects an image-encoded time-domain signal with a single-pixel photodetector in a FTDM manner. As a proof-of-principle demonstration, we use the method to show ultrafast two-color (bright-field and fluorescence) single-pixel microscopy of breast cancer cells at a high frame rate of 32,000 fps and ultrafast image velocimetry of fluorescent particles flowing at a high speed of ${ \gt }{2}\;{\rm m/s}$>2m/s.
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Lei C, Kobayashi H, Wu Y, Li M, Isozaki A, Yasumoto A, Mikami H, Ito T, Nitta N, Sugimura T, Yamada M, Yatomi Y, Di Carlo D, Ozeki Y, Goda K. High-throughput imaging flow cytometry by optofluidic time-stretch microscopy. Nat Protoc 2018; 13:1603-1631. [DOI: 10.1038/s41596-018-0008-7] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Zhu Z, Chi H, Jin T, Zheng S, Yu X, Jin X, Zhang X. Photonics-enabled compressive sensing with spectral encoding using an incoherent broadband source. OPTICS LETTERS 2018; 43:330-333. [PMID: 29328274 DOI: 10.1364/ol.43.000330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 12/18/2017] [Indexed: 06/07/2023]
Abstract
In this Letter, we propose an approach to achieving photonics-enabled compressive sensing of sparse wideband radio frequency signals in which an incoherent broadband source is applied, and the mixing and integration functions are realized in the optical domain. A spectrum shaper is employed to slice and encode the spectrum of the broadband light according to a predetermined random sequence. Because of the dispersion-induced group delay, the mixing between the incoming signal and the random bit sequence is achieved. At the output of the spectrum shaper, an array of photodetectors is employed to realize down-sampling, and the input sparse signal can be captured in a single-shot mode. Since no pulsed laser is employed, our scheme obviates the need for time-domain synchronization between the repetitive ultra-fast pulses and the random sequence. Experimental demonstrations and numerical results are presented to verify the feasibility and potential of the approach.
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Lei C, Ito T, Ugawa M, Nozawa T, Iwata O, Maki M, Okada G, Kobayashi H, Sun X, Tiamsak P, Tsumura N, Suzuki K, Di Carlo D, Ozeki Y, Goda K. High-throughput label-free image cytometry and image-based classification of live Euglena gracilis. BIOMEDICAL OPTICS EXPRESS 2016; 7:2703-8. [PMID: 27446699 PMCID: PMC4948623 DOI: 10.1364/boe.7.002703] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 06/15/2016] [Accepted: 06/15/2016] [Indexed: 05/12/2023]
Abstract
We demonstrate high-throughput label-free single-cell image cytometry and image-based classification of Euglena gracilis (a microalgal species) under different culture conditions. We perform it with our high-throughput optofluidic image cytometer composed of a time-stretch microscope with 780-nm resolution and 75-Hz line rate, and an inertial-focusing microfluidic device. By analyzing a large number of single-cell images from the image cytometer, we identify differences in morphological and intracellular phenotypes between E. gracilis cell groups and statistically classify them under various culture conditions including nitrogen deficiency for lipid induction. Our method holds promise for real-time evaluation of culture techniques for E. gracilis and possibly other microalgae in a non-invasive manner.
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Affiliation(s)
- Cheng Lei
- Department of Chemistry, University of Tokyo, Tokyo, Japan; Department of Electronic Engineering, Tsinghua University, Beijing, China;
| | - Takuro Ito
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Japan; Systems Biology Program, Graduate School of Media and Governance, Keio University, Fujisawa, Japan
| | - Masashi Ugawa
- Department of Chemistry, University of Tokyo, Tokyo, Japan
| | - Taisuke Nozawa
- Department of Chemistry, University of Tokyo, Tokyo, Japan
| | | | - Masanori Maki
- Graduate School of Advanced Integration Science, Chiba University, Chiba, Japan
| | - Genki Okada
- Graduate School of Advanced Integration Science, Chiba University, Chiba, Japan
| | | | - Xinlei Sun
- Department of Chemistry, University of Tokyo, Tokyo, Japan; Department of Mechanical Engineering, Tsinghua University, Beijing, China
| | - Pimsiri Tiamsak
- Department of Chemistry, University of Tokyo, Tokyo, Japan; Department of Medicine, Thammasat University, Bangkok, Thailand
| | - Norimichi Tsumura
- Graduate School of Advanced Integration Science, Chiba University, Chiba, Japan
| | | | - Dino Di Carlo
- Department of Bioengineering, University of California, Los Angeles, USA; California NanoSystems Institute, University of California, Los Angeles, USA; Jonsson Comprehensive Cancer Center, University of California, Los Angeles, USA
| | - Yasuyuki Ozeki
- Department of Electrical Engineering and Information Systems, University of Tokyo, Tokyo, Japan
| | - Keisuke Goda
- Department of Chemistry, University of Tokyo, Tokyo, Japan; Department of Electrical Engineering, University of California, Los Angeles, USA; Japan Science and Technology Agency, Tokyo, Japan;
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Guo Q, Chen H, Weng Z, Chen M, Yang S, Xie S. Compressive sensing based high-speed time-stretch optical microscopy for two-dimensional image acquisition. OPTICS EXPRESS 2015; 23:29639-29646. [PMID: 26698446 DOI: 10.1364/oe.23.029639] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this paper, compressive sensing based high-speed time-stretch optical microscopy for two-dimensional (2D) image acquisition is proposed and experimentally demonstrated for the first time. A section of dispersion compensating fiber (DCF) is used to perform wavelength-to-time conversion and then ultrafast spectral shaping of broadband optical pulses can be achieved via high-speed intensity modulation. A 2D spatial disperser comprising a pair of orthogonally oriented dispersers is employed to produce spatially structured illumination for 2D image acquisition and a section of single mode fiber (SMF) is utilized for pulse compression in the optical domain. In our scheme, a 1.2-GHz photodetector and a 50-MHz analog-to-digital converter (ADC) are used to acquire the energy of the compressed pulses. Image reconstructions are demonstrated at a frame rate of 500 kHz and a sixteen-fold image compression is achieved in our proof-of-concept demonstration.
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Potma EO, Campagnola P. Introduction to the novel techniques in microscopy feature issue. BIOMEDICAL OPTICS EXPRESS 2015; 6:4275-4276. [PMID: 26600993 PMCID: PMC4646537 DOI: 10.1364/boe.6.004275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Indexed: 06/05/2023]
Abstract
The editors introduce the feature issue on "Novel Techniques in Microscopy," which was the topic of a symposium held on April 12-15, 2015, in Vancouver, BC. This symposium was part of the Optics in the Life Sciences Congress.
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Affiliation(s)
- Eric O. Potma
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - Paul Campagnola
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI 53706, USA
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