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.
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
Lanthanide-doped nanoparticles (LnNPs) can harvest the near-infrared (NIR) light to emit higher energy photons (upconversion) or lower energy photons (downshifting). In a recent study published in ACS Nano, a team led by ...
Bio & Medicine
Jan 5, 2022
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86
Optoelectronics—technology that gives off, detects, or controls light—are used everywhere in modern electronics and include devices such as light-emitting diodes (LEDs) and solar cells. Within these devices, the movement ...
Nanophysics
Aug 25, 2021
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297
