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Measuring Etendue of LED sources

  1. Mar 31, 2014 #1
    How does one measure the etendue experimentally (when the area of the emitter and the angular distribution is not provided) in order to compare the focusing strength of two LED sources in an optical setup?

    Thanks!
     
  2. jcsd
  3. Apr 1, 2014 #2

    UltrafastPED

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