spherical aberration

spherical aberration
Aberration Ab`er*ra"tion, n. [L. aberratio: cf. F. aberration. See {Aberrate}.] 1. The act of wandering; deviation, especially from truth or moral rectitude, from the natural state, or from a type. ``The aberration of youth.'' --Hall. ``Aberrations from theory.'' --Burke. [1913 Webster]

2. A partial alienation of reason. ``Occasional aberrations of intellect.'' --Lingard. [1913 Webster]

Whims, which at first are the aberrations of a single brain, pass with heat into epidemic form. --I. Taylor. [1913 Webster]

3. (Astron.) A small periodical change of position in the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer; called {annual aberration}, when the observer's motion is that of the earth in its orbit, and daily or {diurnal aberration}, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. {Planetary aberration} is that due to the motion of light and the motion of the planet relative to the earth. [1913 Webster]

4. (Opt.) The convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus; called {spherical aberration}, when due to the spherical form of the lens or mirror, such form giving different foci for central and marginal rays; and {chromatic aberration}, when due to different refrangibilities of the colored rays of the spectrum, those of each color having a distinct focus. [1913 Webster]

5. (Physiol.) The passage of blood or other fluid into parts not appropriate for it. [1913 Webster]

6. (Law) The producing of an unintended effect by the glancing of an instrument, as when a shot intended for A glances and strikes B. [1913 Webster]

Syn: Insanity; lunacy; madness; derangement; alienation; mania; dementia; hallucination; illusion; delusion. See {Insanity}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • spherical aberration — n. optical distortion resulting from the spherical shape of a lens or mirror …   English World dictionary

  • Spherical aberration — shape of lenses and mirrors. This is an important effect, as spherical shapes are much easier to produce than aspherical and so most lenses have spherical shapes. Positive spherical aberration means peripheral rays are bent too much. Negative… …   Wikipedia

  • spherical aberration — sferinė aberacija statusas T sritis fizika atitikmenys: angl. spherical aberration vok. sphärische Aberration, f rus. сферическая аберрация, f pranc. aberration de sphéricité, f; aberration sphérique, f …   Fizikos terminų žodynas

  • spherical aberration — F/A/V light passing through the edges of the lenses can also have focal lengths different from those passing through the center is called spherical aberration …   Audio and video glossary

  • spherical aberration — spher·i·cal aberration sfir i kəl , sfer n aberration that is caused by the spherical form of a lens or mirror and that gives different foci for central and marginal rays * * * zonal aberration in relation to an axial point; see negative… …   Medical dictionary

  • spherical aberration — noun Date: 1868 aberration that is caused by the spherical form of a lens or mirror and that gives different foci for central and marginal rays …   New Collegiate Dictionary

  • spherical aberration — noun an optical aberration resulting in a distorted image • Hypernyms: ↑aberration, ↑distortion, ↑optical aberration …   Useful english dictionary

  • spherical aberration — noun A type of lens aberration which causes blurriness, particularly away from the centre of the lens …   Wiktionary

  • spherical aberration — variation in focal length of a lens or mirror from center to edge, due to its spherical shape. [1865 70] * * * …   Universalium

  • spherical aberration — noun a loss of definition in the image arising from the surface geometry of a spherical mirror or lens …   English new terms dictionary

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