Grating matters

  • Thread starter Neo20
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Hi,

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

Could anyone tell me?

Thanks!
 

Answers and Replies

Claude Bile
Science Advisor
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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.

Claude.
 

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