Results 1 to 10 of about 142,491 (163)

Snapshot Multi-Wavelength Birefringence Imaging [PDF]

Sensors
A snapshot multi-wavelength birefringence imaging measurement method was proposed in this study. The RGB-LEDs at wavelengths 463 nm, 533 nm, and 629 nm were illuminated with circularly polarized light after passing through a circular polarizer.
Shuang Wang, Xie Han, Kewu Li
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Multi‐Wavelength Achromatic 3D Meta‐holography with Zoom Function [PDF]

Advanced Science
With the development of nanofabrication technology, meta‐holography has shown unprecedented potential for light regulation. However, due to the wavelength mismatch, chromatic aberrations are inevitable in multi‐wavelength meta‐holography. Moreover, since
Chao Liu, Yi Zheng, Di Wang, Qian Huang, Xiao‐Wei Li, Fan‐Chuan Lin, You‐Ran Zhao, Yi‐Wei Zheng, Xiao‐Ke Lu, Xin‐Ru Li, Xin‐Ru Zheng, Xin Xie, Kun Song, Zhen‐Fei Li, Wei Lu, Din Ping Tsai, Ruo‐Nan Ji, Qiong‐Hua Wang   +17 more
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Multi-wavelength structured light based on metasurfaces for 3D imaging [PDF]

Nanophotonics
Structured light projection provides a promising approach to achieving fast and non-contact three-dimensional (3D) imaging. The resolution is a crucial index that represents security and accuracy in applications such as face recognition and robot vision.
Lyu Baiying, Chen Chen, Wang Jian, Li Chang, Zhang Wei, Feng Yuxiang, Dong Fei, Zhang BaoShun, Zeng Zhongming, Wang Yiqun, Wu Dongmin   +10 more
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A Review of Wearable Multi-Wavelength Photoplethysmography [PDF]

IEEE Reviews in Biomedical Engineering, 2023
Optical pulse detection 'photoplethysmography' (PPG) provides a means of low cost and unobtrusive physiological monitoring that is popular in many wearable devices. However, the accuracy, robustness and generalizability of single-wavelength PPG sensing are sensitive to biological characteristics as well as sensor configuration and placement; this is ...
Daniel Ray, Tim Collins, Sandra Woolley, Prasad Ponnapalli   +3 more
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Lomonosov GRB Catalogue: The First Experience of Prompt Emission Multi-Wavelength Observations

Universe, 2021
This paper presents a catalogue of gamma-ray bursts (GRBs) that were detected by the instruments onboard the Lomonosov space observatory. The Lomonosov mission gave the first experience of not only multi-wavelength (from optical to gamma) observations of
V. A. Sadovnichy, M. I. Panasyuk, S. I. Svertilov, V. M. Lipunov, V. V. Bogomolov, A. V. Bogomolov, E. S. Gorbovskoy, A. F. Iyudin, V. V. Kalegaev, V. G. Kornilov, I. H. Park, V. L. Petrov, N. N. Vedenkin, I. V. Yashin   +13 more
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Multi-Wavelength Study of 4C+28.07 [PDF]

The Astrophysical Journal, 2021
Abstract 4C+28.07 is a γ-ray flat-spectrum-radio-quasar-type source. It is often monitored at different frequencies, though long-term multi-wavelength data of this source have not been modeled in detail before. We have analyzed ∼12 yr (2008 August–2020 May) of Fermi-LAT data with a binning of 10 day timescale and observed three ...
Avik Kumar Das, Raj Prince, Nayantara Gupta   +2 more
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Multi-Wavelength Spatiotemporal Mode-Locked Fiber Laser at 1.55 μm

Photonics, 2022
We propose and demonstrate an effective and simple multi-wavelength spatiotemporal mode-locked (STML) laser. The laser introduces a multimode interference (MMI) effect using the core diameter mismatch of the fibers, thus enabling simultaneous mode ...
Ze-Long Ma, Tian-Xu Zhao, Wei-Yi Hong, Hu Cui, Zhi-Chao Luo, Wen-Cheng Xu, Ai-Ping Luo   +6 more
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Performance Analysis of Three-Wavelength Multi-Channel Photonic Crystal Filters of Different Sizes

Crystals, 2022
Multi-wavelength and multi-channel photonic crystal filters are designed with different sizes considered by using a two-dimensional quadric lattice photonic crystal structure to solve the problems of a multi-channel filter with structure complexity ...
Wei Liu, Laisheng Zhang, Fan Zhang
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A Smartphone-Based Biosensor for Non-Invasive Monitoring of Total Hemoglobin Concentration in Humans with High Accuracy

Biosensors, 2022
In this paper, we propose a smartphone-based biosensor for detecting human total hemoglobin concentration in vivo with high accuracy. Compared to the existing biosensors used to measure hemoglobin concentration, the smartphone-based sensor utilizes the ...
Zhipeng Fan, Yong Zhou, Haoyu Zhai, Qi Wang, Honghui He   +4 more
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Multi-wavelength Behaviour of III Zw2 [PDF]

Publications of the Astronomical Society of Australia, 2002
AbstractIII Zw2 was observed with XMM-Newton in July 2000. Its X-ray spectrum can be described by a power law of photon index Γ≈1.7 with a Gaussian line at 6.7 KeV. There is no significant evidence of intrinsic absorption within the source or of a soft X-ray excess.
Salvi, Nikita, Page, Mat J., Stevens, Jason A., Mason, Keith O., Wu, Kinwah   +4 more
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