How the CIE 1931 color-matching functions were derived from Wright-Guild data

Fairman, Hugh S.; Brill, Michael H.; Hemmendinger, Henry

doi:10.1002/(sici)1520-6378(199702)22:1<11::aid-col4>3.0.co;2-7

Cited by 244 publications

(84 citation statements)

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“…The luminescent intensity of the emission spectral measurements has been characterized using the CIE1931 chromaticity diagram (Figure 7) to get information about the composition of all colors on the basis of color matching functions , , and [32,33]. The ( x , y ) coordinates are used to represent the color and locus of all the monochromatic color coordinates.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Gd2O3:Eu nanoplatelets for MRI and fluorescence imaging

et al. 2015

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We synthesized Gd2O3 and Gd2O3 doped by europium (Eu) (2% to 10%) nanoplatelets using the polyol chemical method. The synthesized nanoplatelets were characterized by X-ray diffraction (XRD), FESEM, TEM, and EDX techniques. The optical properties of the synthesized nanoplatelets were investigated by photoluminescence spectroscopy. We also studied the magnetic resonance imaging (MRI) contrast enhancement of T1 relaxivity using 3 T MRI. The XRD for Gd2O3 revealed a cubic crystalline structure. The XRD of Gd2O3:Eu3+ nanoplatelets were highly consistent with Gd2O3 indicating the total incorporation of the Eu3+ ions in the Gd2O3 matrix. The Eu doping of Gd2O3 produced red luminescence around 612 nm corresponding to the radiative transitions from the Eu-excited state 5D0 to the 7F2. The photoluminescence was maximal at 5% Eu doping concentration. The stimulated CIE chromaticity coordinates were also calculated. Judd-Ofelt analysis was used to obtain the radiative properties of the sample from the emission spectra. The MRI contrast enhancement due to Gd2O3 was compared to DOTAREM commercial contrast agent at similar concentration of gadolinium oxide and provided similar contrast enhancement. The incorporation of Eu, however, decreased the MRI contrast due to replacement of gadolinium by Eu.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Gd2O3:Eu nanoplatelets for MRI and fluorescence imaging

et al. 2015

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“…The black point measured at the excitation wavelength of 365 nm displays a coordinate of (0.239, 0.318) in the CIE XYZ color space. By the conventional method, [21][22][23] we estimated the chromaticity coordinate (r, g, b) in CIE RGB color space as (0.081, 0.417, 0.502), characterized by "white-blue". Figure 1(c) plots the 3D data summarizing the excitation and emission spectra of the Si QD solution, in which the vertical and horizontal axes represent excitation and emission wavelengths, respectively.…”

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confidence: 99%

White-blue electroluminescence from a Si quantum dot hybrid light-emitting diode

Xin

Nishio

Saitow

2015

Applied Physics Letters

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“…Internal S3 mini camera settings convert automatically the irradiance (photons m

^{- 2}

·nm

^{- 1}

) into digital numbers (DN) [26] leading to a new unit DN·s

^{- 1}

for

I_{r e d}

. Conversion process from raw-images of the camera to RGB images takes place as an internal process [26] following the colorimetric standards worked out by Commission Internationale de l’Eclairage 1931 XYZ color space [27,28,29]. …”

Section: Methodsmentioning

confidence: 99%

SmartFluo: A Method and Affordable Adapter to Measure Chlorophyll a Fluorescence with Smartphones

Friedrichs

Busch

Woerd

2017

Sensors

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In order to increase the monitoring capabilities of inland and coastal waters, there is a need for new, affordable, sensitive and mobile instruments that could be operated semi-automatically in the field. This paper presents a prototype device to measure chlorophyll a fluorescence: the SmartFluo. The device is a combination of a smartphone offering an intuitive operation interface and an adapter implying a cuvette holder, as well as a suitable illumination source. SmartFluo is based on stimulated fluorescence of water constituents such as chlorophyll a. The red band of the digital smartphone camera is sensitive enough to detect quantitatively the characteristic red fluorescence emission. The adapter contains a light source, a strong light emitting diode and additional filters to enhance the signal-to-noise ratio and to suppress the impact of scattering. A novel algorithm utilizing the red band of the camera is provided. Laboratory experiments of the SmartFluo show a linear correlation (R2 = 0.98) to the chlorophyll a concentrations measured by reference instruments, such as a high-performance benchtop laboratory fluorometer (LS 55, PerkinElmer).

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How the CIE 1931 color-matching functions were derived from Wright-Guild data

Cited by 244 publications

References 0 publications

Synthesis of Gd2O3:Eu nanoplatelets for MRI and fluorescence imaging

Synthesis of Gd2O3:Eu nanoplatelets for MRI and fluorescence imaging

White-blue electroluminescence from a Si quantum dot hybrid light-emitting diode

SmartFluo: A Method and Affordable Adapter to Measure Chlorophyll a Fluorescence with Smartphones

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