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LED Characterization

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LED Characterization

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LEDs are used today in many applications including lighting of homes, streets, and businesses where they are beginning to supplant more traditional light sources. Despite their advantages, measurement techniques of the power, flux (equivalent to power but measured in units of lumens), and spectrum of LEDs is not very different from that of traditional light sources. The main reason for this is that these sources emit incoherent light, which radiates uniformly in all directions. These sources produce highly divergent light emission. Accurately measuring the power of such sources using a sensor with a fixed aperture size requires sophisticated collection geometries.

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