Results 11 to 20 of about 179,886 (315)
Optical Methods of Methane Detection
Sensors, 2023 Methane is the most frequently analyzed gas with different concentrations ranging from single ppm or ppb to 100%. There are a wide range of applications for gas sensors including urban uses, industrial uses, rural measurements, and environment monitoring.
Miroslaw Kwasny, Aneta Bombalska
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Low-Cost ZnO Spray-Coated Optical Fiber Sensor for Detecting VOC Biomarkers of Diabetes [PDF]
, 2023 A non-invasive optical fiber sensor for detecting volatile organic compounds (VOCs) as biomarkers of diabetes is proposed and experimentally demonstrated.
Viphavakit, C. +7 more
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Optical detection of microplastics in water
Environmental Science and Pollution Research, 2021 Unfortunately, the plastic pollution increases at an exponential rate and drastically endangers the marine ecosystem. According to World Health Organization (WHO), microplastics in drinking water have become a concern and may be a risk to human health. One of the major efforts to fight against this problem is developing easy-to-use, low-cost, portable ...
Ahmet H. Iri +6 more
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Direct optical detection [PDF]
Analytical and Bioanalytical Chemistry, 2015 Over the last 20 years, optical methods have been increasingly used in analytical and bioanalytical applications. These methods have been applied in two rather broad ways: for direct and for indirect detection. Whereas direct-detection approaches typically enable the detection of an analyte in a single step, indirect approaches usually require the use ...
Günter, Gauglitz, Jiří, Homola
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Deep-Learning-Based Halo-Free White-Light Diffraction Phase Imaging
Frontiers in Physics, 2021 In white-light diffraction phase imaging, when used with insufficient spatial filtering, phase image exhibits object-dependent artifacts, especially around the edges of the object, referred to the well-known halo effect.
Kehua Zhang +7 more
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Detecting Microplastics with Optics
Optics and Photonics News, 2020 Emerging optical techniques for sniffing out millimeter- to sub-micron-scale plastics in aquatic settings could aid in the fight against a looming environmental threat.
Asamoah Benjamin +4 more
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Optical Accelerometers for Detecting Low-Frequency Micro-Vibrations
Applied Sciences, 2022 Optical accelerometers are high-precision inertial sensors that use optical measurement technology to achieve high-precision and electromagnetic interference-resistant acceleration measurements.
Ying-Jun Lei +4 more
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Analysis of forward Brillouin scattering in optical fibers with whispering-gallery modes [PDF]
EPJ Web of Conferences, 2023 A new approach to detect and analyze transverse acoustic mode resonances (TAMRs), responsible for forward Brillouin scattering in optical fibers, is reported using optical whispering gallery modes (WGMs).
Sánchez Luis A. +3 more
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Nondestructive Detection of an Optical Photon [PDF]
Science, 2013 Nondestructive Photon Detection The click of a photon detector is the usual method for detecting a photon and can be sufficiently sensitive to detect even a single photon. Such a detection process is, however, destructive—the photon is annihilated. Reiserer et al. (
Reiserer A., Ritter S., Rempe G.
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Biosensors, 2021 Hot-band absorption (HBA)-induced anti-Stokes fluorescence (ASF) with longer-wavelength excitation is one effective pathway to deep penetration and low autofluorescence in intravital fluorescence imaging, raising demands for fluorophores with broad ...
Yuhuang Zhang +9 more
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