Phosphors with rare earth (RE) ions are widely applied to optical temperature measurements. Moreover, the near-infrared (NIR) emission of phosphors
READ MOREAbstract. The precision of modern length interferometry and geodetic surveying far exceeds the accuracy, which is ultimately limited by the inadequacy of currently used equations for the refractive index of the atmosphere. I have critically reviewed recent research at the National Physical Laboratory, the International Bureau of Weights and
READ MOREAnd using two-photon technology, visible light or even near infrared light can be used to promote the photoisomerization of azo derivatives. Therefore, optimization of azobenzenes that can effectively respond to two-photon excitation has received extensive research attention. Specifically, the optimization of two-photon absorption usually is
READ MOREAir-bridged photonic crystal slabs are demonstrated at visible and near-infrared wavelengths. We present experimental and theoretical studies of the transmission spectra of air-bridged photonic crystal slabs with free space illumination using collimated and focused beams. We show that the resonances of an air-bridged photonic crystal slab
READ MOREIntegrated photonics at visible and near-infrared (VNIR) wavelengths is important for applications ranging from sensing 1,2,3 and spectroscopy 4 to communications 5 and quantum information
READ MOREPhosphors with rare earth (RE) ions are widely applied to optical temperature measurements. Moreover, the near-infrared (NIR) emission of phosphors has potential applications in the biological field. Herein, Gd2O3:x%Nd3+/Yb3+(0.2 ≤ x ≤ 0.8) samples are successfully synthesized by the sol–gel method, and thei
READ MOREIn this paper, the potential of the visible and near-infrared (Vis-NIR) spectroscopy technique as an approach to detect diseases and stress in plants will be
READ MOREEmerging applications in quantum information, microscopy, biosensing, depth sensing, and augmented reality demand miniaturized components in the visible (VIS) and near-infrared (NIR) spectrum with wavelengths between 380 and 1100 nm. Foundry silicon photonics, which has been optimized for telecommunication wavelengths, can be adapted to this
READ MOREThe nanopillar surface is practically invisible in the visible and near-infrared wavelength ranges (Figure 3d). Importantly, this method also can be used for highly curved surfaces. For an unstructured semispherical fused silica shell, two mirror images of the lamp reflected from both shell surfaces can be clearly observed.
READ MORESometimes, the 350–1000 wavelength range is referred as VNIR (visible-near-infrared), and the 1000–2500 range is referred as the SWIR (short-wave infrared) in remote sensing literature . The human eyes and brain can process spectral information from the visible region and see color, while modern spectroscopy can observe precise details
READ MOREThe visible and near-infrared (VNIR) portion of the electromagnetic spectrum has wavelengths between approximately 400 and 1100 nanometers (nm). It combines the full visible spectrum with an adjacent portion of the infrared spectrum up to the water absorption band between 1400 and 1500 nm. Some definitions also include the short-wavelength infrared band from 1400 nm up to the water abso
READ MOREPurpose Comparing to conventional laboratory methods, visible–near-infrared reflectance (vis–NIR) spectroscopy is a more practical and cost-effective approach for estimating soil physical and chemical properties. Materials and methods This paper aims to build statistical machine learning models to investigate the efficiency of spectral data
READ MOREWe present a dataset of close range hyperspectral images of materials that span the visible and near infrared spectrums: HyTexiLa (Hyperspectral Texture images acquired in Laboratory). The data is intended to provide high spectral and spatial resolution reflectance images of 112 materials to study spatial and spectral textures. In this paper we discuss
READ MORESmaller particle sizes typically increase albedo in the visible to near-infrared (Mustard & Hays 1997), and none of the major mechanisms for slope streak formation result in smaller particles within the streaks (Sullivan et al. 2001, Figure 10). However, there are multiple mechanisms for increasing particle size within a streak
READ MOREEmerging applications in quantum information, microscopy, biosensing, depth sensing, and augmented reality demand miniaturized components in the visible (VIS) and near
READ MOREIn this study, we report novel diazocoumarin compounds that can be photoactivated by visible (430–490 nm) and near-infrared light (800 nm) irradiation to photo-uncage reactive carbene intermediates, which could subsequently undergo an insertion reaction with concomitant fluorescence "turned on". With these new molecules in
READ MOREThis article provides an introduction to spectroscopy in the visible (VIS ≈ 300–700 nm) and near-infrared (NIR ≈ 700–5000 nm) regions of the electromagnetic spectrum and
READ MOREThe difference between near infrared and far infrared is simple—distance. The former is closer to visible light on the spectrum than the latter. They both can''t be detected by the naked human eye, but far infrared can generate heat.
READ MORENear-infrared spectroscopy (NIRS) is a spectroscopic method that uses the near-infrared region of the electromagnetic spectrum (from 780 nm to 2500 nm). (UV), visible (Vis), or mid-infrared (MIR) spectrometers. In the 1980s, a single-unit, stand-alone NIRS system was made available.
READ MOREHere the authors demonstrate an ultra-low drive voltage visible to near infrared range electro-optic modulator in the form of amplitude and phase modulation
READ MOREVisible and near-infrared (VNIR) spectroscopy is one of the methods of spectroscopy that study spectral reflectance of planetary surfaces in visible (350–700
READ MOREVisible (RGB) and Near-infrared(NIR) spectra provide different kinds of data to a system. Information provided by the visible spectrum is similar to how a human eye perceives things, and in certain situations, it is incapable of producing useful results. For instance, RGB systems will not produce satisfactory results in the presence of
READ MOREIn this paper, after briefly reviewing recent advances of visible and infrared image fusion, we present a visible and infrared image fusion benchmark (VIFB) which consists of 21
READ MOREVisible-Near Infrared (vis-NIR) spectroscopy can provide a faster, cost-effective, and user-friendly solution to monitor leaf N status, potentially overcoming the limitations of current techniques. The objectives of the study were to develop and validate partial least square regression (PLSR) to estimate the total N contents of fresh and
READ MOREWe found that there are four approaches for achieving visible light azo photoswitches: (1) modification of different substituents to enable direct excitation by
READ MOREVisible and near-infrared reflectance spectroscopy (VNIR, 350–2500 nm), that is, the study of light of the visible and near-infrared reflected from material
READ MOREA novel vis-NIR neutral pH probe ESCY was facilely prepared by the ethylene bridging of N-alkylated indolium and 4-(diphenylamino)benzaldehyde.The pH titration indicated that ESCY displayed a remarkable emission enhancement in the vis-NIR fluorescence region (λ em = 650 nm) when the pH is decreased from 10.00 to 5.00, and the pK a value was 7.38 near
READ MOREThe data acquired using three proximal sensing techniques, visible-near-infrared (vis-NIR), mid-infrared (MIR), and portable X-ray fluorescence (pXRF) spectroscopy were used as input for partial least squares regression to develop models predicting total Cd and Cd fractions. The average total Cd concentration was 0.58 mg
READ MORE23 Skara, Sweden, E-mail: [email protected]. Abstract. This chapter provides a review on the state of so il visible–near infrared (vis–NIR) spectroscopy. Our.
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