Not to be confused with barrel distortion, in which the image appears to be warped onto a sphere.
Optical aberration
In optics, spherical aberration (SA) is a type of aberration found in optical systems that have elements with spherical surfaces. This phenomenon commonly affects lenses and curved mirrors, as these components are often shaped in a spherical manner for ease of manufacturing. Light rays that strike a spherical surface off-centre are refracted or reflected more or less than those that strike close to the centre. This deviation reduces the quality of images produced by optical systems. The effect of spherical aberration was first identified by Ibn al-Haytham who discussed it in his work Kitāb al-Manāẓir.[1]
^Boudrioua, Azzedine; Rashed, Roshdi; Lakshminarayanan, Vasudevan (2017-08-15). Light-Based Science: Technology and Sustainable Development, The Legacy of Ibn al-Haytham. CRC Press. ISBN 978-1-351-65112-7.
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In optics, sphericalaberration (SA) is a type of aberration found in optical systems that have elements with spherical surfaces. This phenomenon commonly...
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distant objects, since spherical mirror systems, like spherical lenses, suffer from sphericalaberration. Distorting mirrors are used for entertainment. They...
wavefront aberration pattern. Most eyes show positive sphericalaberration when unaccommodated with a trend toward negative sphericalaberration on accommodation...
In optics, chromatic aberration (CA), also called chromatic distortion and spherochromatism, is a failure of a lens to focus all colors to the same point...
wavelength of the electron wave, C s {\displaystyle C_{s}} = The sphericalaberration of the objective lens The contrast transfer function can also be...
is a lens that is designed to limit the effects of chromatic and sphericalaberration. Achromatic lenses are corrected to bring two wavelengths (typically...
configurations, such as in sphericalaberration corrected instruments, or TEMs using energy filtering to correct electron chromatic aberration. The optical reciprocity...
forms images that are blurred due to sphericalaberration. A soft focus lens deliberately introduces sphericalaberration in order to give the appearance of...
more or less round disc. Depending on how a lens is corrected for sphericalaberration, the disc may be uniformly illuminated, brighter near the edge, or...
of using parabolic mirrors, primarily reduction of sphericalaberration with no chromatic aberration, led to many proposed designs for reflecting telescopes...
(sometimes called a Bird–Jones) uses a spherical primary mirror in place of a parabolic one, with sphericalaberrations corrected by sub-aperture corrector...
parabolic mirrors (primarily a reduction of sphericalaberration with elimination of chromatic aberration) led to several proposed designs for reflecting...
address different depths in the medium, and at different depths the sphericalaberration induced in the wavefront is different, a method is required to dynamically...
complex surface profile can reduce or eliminate sphericalaberration and also reduce other optical aberrations such as astigmatism, compared to a simple lens...
surfaces of the reflector have different radii to correct the aberration of the spherical mirror. Light passes through the glass twice, making the overall...
K 1 = − 1 {\displaystyle K_{1}=-1} . Thanks to that there is no sphericalaberration introduced by the primary mirror. The secondary mirror, however,...
different dispersion, 'crown' and 'flint glass', to reduce chromatic and sphericalaberration. Each side of each piece is ground and polished, and then the two...
optical aberrations. The best-known aberrations include sphericalaberration and coma. However, there may be more complex sources of aberrations such as...
spherical mirror is double of its curvature and Petzval radius of a mirror is equal to its focal length. The primary way to control this aberration is...
photographic lens completely corrected for the three main optical aberrations: sphericalaberration, coma, and astigmatism. Early lenses often included the word...
parallel to the axis of the dish. In contrast with spherical reflectors, which suffer from a sphericalaberration that becomes stronger as the ratio of the beam...
1990, but its main mirror had been ground incorrectly, resulting in sphericalaberration that compromised the telescope's capabilities. The optics were corrected...