| monochromatic aberration | A defect in an optical image arising because of the nature of lenses; the main types are spherical, coma, curvature, and distortion aberration, and astigmatism of oblique pencils. (05 Mar 2000) |
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| colour aberration | When using white light through a lens system, it is inevitable that different wave lengths (colours) are brought to a focus at slightly different points. As a consequence, there are chromatic aberations in the image, good microscope objectives are therefore corrected for this at two wave lengths (achromats) or at three wave lengths (apochromats), as well as for spherical aberration. (18 Nov 1997) |
| coma aberration | The distortion of image formation created when a bundle of light rays enters an optical system not parallel to the optic axis. <botany> Any tuft, as the hairs on a seed, or the greenery on a radish or a pineapple. Synonym: coma. Origin: G. Kome, hair, foliage (05 Mar 2000) |
| curvature aberration | Lack of spatial correspondence causing the image of a straight extended object to appear curved. (05 Mar 2000) |
| newtonian aberration | When using white light through a lens system, it is inevitable that different wave lengths (colours) are brought to a focus at slightly different points. As a consequence, there are chromatic aberations in the image, good microscope objectives are therefore corrected for this at two wave lengths (achromats) or at three wave lengths (apochromats), as well as for spherical aberration. (18 Nov 1997) |
| dioptric aberration | <microscopy> A lens defect in which image forming rays passing through the outer zones of the lens focus at a distance from the principal plane, different from that of the rays passing through the centre of the lens. The aberration caused by (near-paraxial) monochromatic light rays or electron beams passing through different radii of a lens not coming to the same focus. (05 Aug 1998) |
| distortion aberration | The faulty formation of an image arising because the magnification of the peripheral part of an object is different from that of the central part when viewed through a lens. (05 Mar 2000) |
| optical aberration | Failure of rays from a point source to form a perfect image after traversing an optical system. (05 Mar 2000) |
| lateral aberration | In spherical aberration, the distance between paraxial focus of central rays on the optic axis. (05 Mar 2000) |
| longitudinal aberration | In spherical aberration, the distance separating the focus of paraxial and peripheral rays on the optic axis. (05 Mar 2000) |
| spherical aberration |
occurs when a lens is ground perfectly spherical causing light rays to fall at different points on the macula where by a common focus can not be achieved.
출처: www.eyesinternational.com/eyecare/contacts_termino...
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| spherical aberration |
the non-convergence of rays from one point of focus when passing through a spherical body, produces a scattering effect on the light ray.
출처: www.schools.net.au/edu/lesson_ideas/optics/glossar...
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| spherical aberration |
A blurring of an image caused by the inability of a mirror to focus properly.
출처: www.go-astronomy.com/glossary/astronomy-glossary-s...
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| spherical aberration |
A problem where a lens or mirror in a telescope is not shaped correctly, so the light from the center is focused at a different location than the light from the edges. You should never have to worry about this. This only shows up in really cheap telescopes. Editorial Note: Not always. Spherical aberration is one of the commoner flaws in relatively inexpensive reflectors of otherwise competent design.
출처: www.astronexus.com/saafaq/glossary.php
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| spherical aberration |
A parabolic mirror will focus incoming light to a single point. A spherical mirror will focus incoming light to different points causing stars to no longer appear as nice round points of light. This distortion is called spherical aberration.
출처: www.dirtyskies.com/index.php/glossary/
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