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High-Speed LED Spectrometers

Photonics Spectra
Feb 2011
Labsphere Inc., PhotonicsRequest Info
 
Designed for a full range of LED characterization measurements, Labsphere Inc.’s CDS-5400 and CDS-9800 high-speed LED spectrometers offer reliability, speed and accuracy with a choice of spectral ranges to suit application needs. Fiber optic connectors link the instruments to a variety of measurement devices for spectroradiometric and photometric measurements for solid-state lighting. When used with the company’s integrating spheres, the spectrometers measure critical spectral characteristics of LEDs, including flux; purity; intensity; luminance; tristimulus values; chromaticity co-ordinates; dominant, peak and centroid wavelengths; and correlated color temperature and rendering properties. To capture and organize data, dynamic link library drivers are available to connect the spectrometers to proprietary quality assurance, calibration and production software.


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GLOSSARY
chromaticity coordinates
Proportions of standard primaries (tristimulus values) required for a color match; ratios of each tristimulus value of a color to their sum. In the CIE colorimetric system, designated X, Y and Z.
correlated color temperature
Temperature of the blackbody having chromaticity nearest to that of the test source on a specified chromaticity diagram.
dominant wavelength
A single wavelength of light that matches the color of a given sample when combined in suitable proportions with white light and a suitable adjustment of intensity.
flux
Time rate of flow of energy; the radiant or luminous power in a beam.
intensity
Flux per unit solid angle.
luminance
Luminous flux emitted from a surface per unit solid angle per unit of area, projected onto a plane normal to the direction of propagation. Also known as brightness and luminous sterance.
peak wavelength
The wavelength at which the radiant intensity of a source is maximum.
photometric
Pertaining to the measurement of the intensity of light.
tristimulus values
The values of the three standard or matching stimuli necessary to provide a match with the light under trial, in a specified trichromatic system.
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