Geoff Ludbrook

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  • in reply to: Diffraction gratings #578625
    Geoff Ludbrook


    I used to make holographic diffraction gratings for use in the X ray region back in the early 1980s when the technique

    was in its infancy. Interference patterns from re-combined laser beams were recorded in photo-resist spun-coated on

    a plane or concave substrate. The angle of re-combination of the two beams defined the groove spacing and the groove profile 

    could be laminar or blazed depending on the recording geometry. The recorded profile was then ion – etched into the

    substrate to form an X-ray resistant grating.

    I can send more detail f you are interested

    Geoff Ludbrook

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