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Photonics Spectra
May 2004
Gamma ScientificRequest Info
LED TESTING Gamma Scientific has released LED test sockets for use with spectroradiometer and photometer systems. The sockets hold LEDs in place to enable precision measurements of spectral characteristics such as luminous flux, radiant intensity and dominant wavelength. They accept standard, miniature and subminiature LEDs. The sockets feature a locking flange that snaps into a CIE Condition A or B baffle tube. An ultraprecision model also includes spring-loaded finger clamps to ensure that the distance from the tip of the LED under test to the detector conforms to CIE publication 127. The sockets are compatible with power supplies from a variety of manufacturers.


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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.
luminous flux
Descriptive of the radiant power of visible light modified by the eye response. It is the measure of the flow of visible light energy past any given point in space in a given time period, and is defined as the amount of flux radiated by a source of 1 candela into a solid angle of 1 steradian.
radiant intensity
The radiant energy emitted within a time period per unit solid angle, usually measured in watts per steradian.
An instrument for measuring the radiant energy from a source at each wavelength throughout the spectrum. The spectral regions are separated either by calibrated filters or by a calibrated monochromator. The detector is an energy receiver such as a thermocouple or photomultiplier.
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