Visible light imaging is a family of methods that acquire spatially resolved information using electromagnetic radiation in the 400–700 nm range, detected by human-vision–matched sensors such as CCD or CMOS arrays. It encompasses bright-field microscopy, color and monochrome photography, and machine-vision systems that rely on reflected, transmitted, or emitted visible photons to generate contrast based on absorption, scattering, and fluorescence within this spectral band. These methods are widely used for noninvasive inspection, documentation, and quantitative analysis, often combined with controlled illumination, optical filters, and computational processing to enhance signal-to-noise ratio, extract morphological or spectral features, and enable automated measurement or classification.
Information technology plays a pivotal role in contemporary society, influencing aspects such as social communication, audio-visual entertainment in daily life, and the integration of cloud computing and the Internet of Things ...
Optics & Photonics
Feb 7, 2024
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71
Many people are familiar with facial recognition systems that unlock smartphones and game systems or allow access to our bank accounts online. But the current technology can require boxy projectors and lenses. Now, researchers ...
Nanophysics
Feb 2, 2024
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237
The past few decades have seen astonishing advances in imaging technology, from high-speed optical sensors that process over two million frames per second to tiny lensless cameras that record images using a single pixel.
Nanophysics
Jan 24, 2024
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103
Integral imaging (II) display is one of the most promising near-eye displays (NEDs) due to its compact volume, full parallax, convenient full-color display, and, more importantly, true-3D and more realistic depth perception ...
Optics & Photonics
Jan 23, 2024
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140
A front-end lens, or meta-imager, created at Vanderbilt University can potentially replace traditional imaging optics in machine-vision applications, producing images at higher speed and using less power.
Nanophysics
Jan 5, 2024
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1265
Light, as an electromagnetic field, has two essential components: amplitude and phase. However, optical detectors, usually relying on photon-to-electron conversion (such as charge-coupled device sensors and the human eye), ...
Optics & Photonics
Jan 3, 2024
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134
Nature Communications published research by an international team from Wits and ICFO- The Institute of Photonic Sciences, which demonstrates the teleportation-like transport of "patterns" of light—this is the first approach ...
Optics & Photonics
Dec 18, 2023
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272
A research team led by Prof. Cao Hongtao at the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences, in cooperation with Prof. Zhang Haizhong's group from Fuzhou University, has developed ...
Nanophysics
Oct 18, 2023
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106
A research team from the National University of Singapore (NUS) Faculty of Science, led by Professor Liu Xiaogang from the Department of Chemistry, has developed a 3D imaging sensor that has an extremely high angular resolution, ...
Nanophysics
May 11, 2023
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215
Terahertz radiation, whose wavelengths lie between those of microwaves and visible light, can penetrate many nonmetallic materials and detect signatures of certain molecules. These handy qualities could lend themselves to ...
Nanophysics
Nov 7, 2022
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526
