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LED Metrology Keeps Pace with Application Demands

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For use as replacements for conventional lighting, LEDs have unique properties that require special testing equipment.

Thomas Attenberger, Instrument Systems GmbH

Advances in technology have made it possible for LED light sources to replace conventional lighting for such uses as automotive lighting and backlighting for liquid crystal displays. Such applications have stringent requirements to guarantee quality — for example, good homogeneity of color and intensity — when large numbers of LEDs are used. Accurate optical measurements are increasingly important for LED manufacturers and users to meet these demands. Several technologies exist for testing LEDs. However, the unique optical properties of LEDs, such as their narrowband spectral power...Read full article

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    Published: May 2005
    Glossary
    backlighting
    The forming of a clear silhouette of an object by placing a light source behind it. Used in machine vision when surface features of an object are not important.
    automotive lightingbacklightingBasic ScienceConsumerFeaturesLED light sourcesliquid crystal displaysSensors & Detectorsspectroscopy

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