distortion
(aberration such that the image is misshapen)
Distortion is a flaw in the image (aberration)
of an optical instrument
such as a telescope, which does not affect the focus
but changes shapes.
An example of a distortion is the production of an image of
an exact square that is flawed because it has curved edges
rather than straight.
Two examples are pincushion distortion and barrel distortion.
(telescopes,aberration)
Further reading:
https://en.wikipedia.org/wiki/Distortion_(optics)
https://photographylife.com/what-is-distortion
https://www.edmundoptics.com/knowledge-center/application-notes/imaging/distortion/
https://learnopencv.com/understanding-lens-distortion/
https://www.telescope-optics.net/distortion.htm
Referenced by pages:
aberration
adaptive optics (AO)
barrel distortion
focal plane tilt
gravitational lensing
pincushion distortion
shift-and-add
speckle imaging
speckle masking
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