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Grating matters

  1. Apr 6, 2008 #1

    I was wondering what happens when a grating is lightened by non collimated beam.

    Could anyone tell me?

  2. jcsd
  3. Apr 6, 2008 #2

    Claude Bile

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    Science Advisor

    Your fringe pattern gets blurred because you are illuminating the grating with multiple wave-vectors, rather than just a single incident wave-vector.

    The resultant pattern is a convolution between the response of the grating to a single wavevector and the k-spectrum (or angular spectrum) of your incident beam.

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