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Radiometry: A Simplified Description of Light Measurement

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Radiometry involves measuring and predicting levels of optical radiation. This article removes some of the confusion surrounding this often complex technology.

Angelo V. Arecchi, Labsphere, Inc.

Radiometry involves several activities. The two most common are the description and measurement of optical radiation, and, starting with the knowledge of some aspects of optical radiation at one location, predicting the measurement that would be made at another. This article will concentrate on the description and measurement of light. A complete description of the light from a source could be extremely complex, involving spatial (at least two, sometimes three dimensions), angular (generally two or more dimensions), and spectral and temporal dimensions. This leaves out concepts...Read full article

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