Point spread function
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The point spread function describes the response of a focused optical imaging system to an idealized point source of light. In casual terms, for a given camera, it is the blurry blob image captured fr
A point source as imaged by a system with negative (top), zero (center), and positive (bottom) spherical aberration. Images to the left are defocused toward the inside, images on the right toward the outside.
The point spread function of Hubble Space Telescope's WFPC camera before corrections were applied to its optical system.
Fourier optics
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Fourier optics is the study of classical optics using Fourier transforms, in which the waveform being considered is regarded as made up of a combination, or superposition, of plane waves. It has some
On the Fourier transforming property of lenses