DoITPoMS - TLP Library Diffraction and imaging

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Diffraction patterns 2

By considering diffraction from a grating, the reciprocal nature of the pattern can be derived. This relationship can be seen in the diffraction patterns of the slits: small features of the diffracting object give wide spacings in the diffraction pattern

$Diffraction patterns from slits of different widths$

Diffraction patterns from slits of different widths. (Click on image to view a larger version.)

More complicated masks, for example a periodic row of apertures, will show more intricate diffraction patterns, but still follow the same basic inverse relationship.

$Diagram of mask consisting of periodic row of apertures and resulting diffraction pattern$

$Photograph of diffraction grating consisting of periodic row of apertures$

Mask consisting of periodic row of apertures

Diffraction pattern for periodic row of apertures

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