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diffraction grating

Discussion in 'Science' started by Ms Chipping, Mar 14, 2012.

  1. Ms Chipping

    Ms Chipping New commenter

    We have a diffraction grating at school which produces an offset diffraction pattern with the central fringe off to one side. I wondered if the grating surface undulated regularly as a result of the manufacturing process producing refraction. Has anyone else observed this in a grating and can you suggest why its happening? Thanks for any help.
     
  2. Ms Chipping

    Ms Chipping New commenter

    We have a diffraction grating at school which produces an offset diffraction pattern with the central fringe off to one side. I wondered if the grating surface undulated regularly as a result of the manufacturing process producing refraction. Has anyone else observed this in a grating and can you suggest why its happening? Thanks for any help.
     
  3. I have encountered asymetery but not an off-set central maxima.
    If this were the case, I would suspect a bulk issue rather than surface. For example a wedge shaped glass substrate. For this a measurable thickness change should be present.
     

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