Abstract
In this chapter, diffraction is limited to the paraxial range, i.e., Fresnel diffraction and Fraunhofer diffraction. Detailed examples of diffraction by a circular aperture and by a rectangular aperture are given. With diffraction through a circular aperture, the formation of the image is analyzed taking into account the wave nature of light; with diffraction through a rectangular aperture, the basic mathematics for one-dimensional diffraction gratings are developed.
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KEYWORDS
Diffraction

Wavefronts

Displays

Diffraction gratings

Spherical lenses

Point spread functions

Far-field diffraction

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