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A loss of definition in the image arising from the surface geometry of a spherical mirror or lens.
‘This spherical aberration means that an observer looking at a background star through a gravitational lens sees two magnified and distorted images on opposite sides of the lensing star.’
‘Correction of the difference in substrate thickness and wavelength, which causes spherical aberration, was corrected by changing the magnification of the objective lens.’
‘This resulted in spherical aberration: the blurring of starlight because the telescope could not bring all the light to a single focus.’
‘However the image did degrade towards the edges and I noted some spherical aberration present.’
‘We can see that the image degradation resulting from the simpler, low-order aberrations such as defocus, third-order coma, or spherical aberration is quite similar.’
‘During testing I noted no spherical aberration, no astigmatism, no curvature of field, no barrel or pincushion, and no rolling distortion.’
‘He explained the laws of formation of images in spherical and parabolic mirrors, and the causes of spherical aberration and a magnification produced by lenses.’
‘The refractive index of the lens material varies from the core to the surface, naturally correcting for spherical aberration.’
‘Booth and coworkers have recently discussed strategies of correcting for specimen-induced spherical aberration in confocal microscopy of skin.’
‘The spherical lens of the octopus eye features a graded index that compensates for spherical aberration, yielding a wide field of view with optimum focal characteristics.’
‘Also, depending on their design, microscope objectives have varying degrees of spherical aberration.’
‘Typical aberrations that can impact imaging performance include astigmatism, chromatic aberration, and spherical aberration.’
‘The undercorrected spherical aberration of the mirror is offset by the overcorrected spherical aberration of the negative lens.’
‘Eliminating spherical aberration for a single element requires an aspheric surface, which is easy to design but not to manufacture using conventional manufacturing methods.’
‘He contributed to the theory of refraction, and as a result of his theory of the wave form of light he was able to calculate the refraction within the lenses and make refractors with lesser chromatic and spherical aberration.’
‘At the very edges there is a slight amount of spherical aberration.’
‘The main effect of the optics portion of a wavefront-coded imaging system is to make the resulting images insensitive to focus-related aberrations such as defocus, spherical aberration, astigmatism, or field curvature.’
‘If we use an asphere to eliminate the spherical aberration in an otherwise all-spherical design, we can, in principle, use the other optical surface to more effectively minimize the other aberrations.’