Word Finder - aberration

definition

The act of wandering; deviation from truth, moral rectitude; abnormal; divergence from the straight, correct, proper, normal, or from the natural state.

example

aberration of character

definition

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; a defect in a focusing mechanism that prevents the intended focal point.

definition

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.

definition

A partial alienation of reason.

definition

A mental disorder, especially one of a minor or temporary character.

definition

Atypical development or structure; deviation from the normal type; an aberrant organ.

definition

A deviation of a tissue, organ or mental functions from what is considered to be within the normal range.

She is normally calm and level headed, so this outburst is an aberration.

We considered our defeat to be an aberration, since we'd easily beaten this team last season.

The discovery of the aberration of light in 1725, due to James Bradley, is one of the most important in the whole domain of astronomy.

The residents considered the recent surge in burglaries to be an aberration, since their neighborhood was known for its safety.

The use of mirrors instead of lenses was another way to avoid chromatic aberration.

The problem with many low priced cameras, is color aberration in the final image.

Orthodox evangelicalism is tempted to view it as an apostasy or an aberration.

Newton was led by this reasoning to the erroneous conclusion that telescopes using refracting lenses would always suffer chromatic aberration.

I also looked into the immense size of chromatic aberration in the human eye.

The aberration is here unsymmetrical, the wave being in advance of its proper place in one half of the aperture, but behind in the other half.

By one, and likewise by several, and even by an infinite number of thin lenses in contact, no more than two axis points can be reproduced without aberration of the third order.

The most important is the chromatic difference of aberration of the axis point, which is still present to disturb the image, after par-axial rays of different colours are united by an appropriate combination of glasses.

His researches in optics, continued until his death, appear to have been begun about the year 1814, when he prepared a paper on the aberration of light, which, however, was not published.

This implies that the whole of Western theology has been an aberration or an exoteric veiling of the truth.'

James Bradley discovered in 1728 the annual shifting of the stars due to the aberration of light, and in 1748, the complicating effects upon precession of the "nutation" of the earth's axis.

Again, since the constant of aberration defines the ratio between the velocity of light and the earth's orbital speed, the span of the terrestrial circuit, in other words, the distance of the sun, is immediately deducible from known values of the first two quantities.

The spherical aberration of a diamond lens can be brought down to one-ninth of a glass lens of equal focus.

With this mineral also spherical and chromatic aberration are a fraction of that of a glass lens, but double refraction, which involves a doubling of the image, is fatal to its use.

When well made such constructions are almost free from spherical aberration, and the chromatic errors are very small.

Axial aberration is reduced by distributing the refraction between two lenses; and by placing the two lenses farther apart the errors of the pencils of rays proceeding from points lying outside the axis are reduced.

As shown in Lens and Aberration, for reproduction through a single lens with spherical surfaces, a combination of the rays is only possible for an extremely small angular aperture.

The aberration of rays in which the outer rays intersect the axis at a shorter distance than the central rays is known as " undercorrection."

Correction of the spherical aberration in strong systems with very large aperture can not be brought about by means of a single combination of two lenses, but several partial systems are necessary.

If, by these methods, a point in the optic axis has been freed from aberration, it does not follow that a point situated only a very small distance from the optic axis can also be represented without spherical aberration.

The representation, free from aberration, of a small surface-element, is only possible, as Abbe has shown, if the objective simultaneously fulfils the " sine-condition," i.e.

The removal of the spherical aberration and the sine-condition can be accomplished only for two conjugate points.

By using these glasses and employing minerals with special optical properties, it is possible to correct objectives so that three colours can be combined, leaving only a quite slight tertiary spectrum, and removing the spherical aberration for two colours.

A further aberration which can only be overcome with difficulty, and even then only partially, is the " curvature of the field, " i.e.

A second method for diminishing the spherical aberration was to alter the distances of the single systems, a method still used.

The lower surface of the slip causes undercorrection on being traversed by the pencil, with over-correction when it leaves it; and since the aberration of the surface lying farthest from the object, i.e.

In order to counteract this aberration the whole objective must be correspondingly under-corrected.

In the apochromats the chromatic difference of the spherical aberrations is eliminated, for the spherical aberration is completely avoided for three colours.

In consequence of these residual aberrations, every object-point is not reproduced in an ideal image-point, but as a small circle of aberration.

In the case of a suitable ocular magnification, the details will be well seen, while the aberration circles remain invisible.

The image, despite the spherical aberration, was by far superior to any existing microscope made by his contemporaries.

The transformation from apparent to topocentric consists of allowing for diurnal aberration.

I knew the cause to be lateral chromatic aberration.

The annual aberration is the aberration correction for an imaginary observer at the Earth's center.

Three SLD glass elements are employed for effective compensation of color aberration, which is a common problem with super-wide angle lenses.

Overall, the COM concluded that the results from the in vitro chromosomal aberration assays were likely to represent a cytotoxic response.

The reduction of almost all visible chromatic aberration at 60x magnification on the base model ES 80 GA SD is a real breakthrough.

The spherical aberration correction is in this region too.

Rudolf guides Santa's sleigh with the biological aberration of a red, glowing nose capable of penetrating thick fog?

If you are using an achromatic refractor, the focus errors will be larger due to chromatic aberration of the telescope.

But the difficulties interposed by spherical and chromatic aberration had arrested progress in that direction until, in 1655, Huygens, working with his brother Constantijn, hit upon a new method of grinding and polishing lenses.

In Bode's Jahrbuch (1776-1780) he discusses nutation, aberration of light, Saturn's rings and comets; in the Nova acta Helvetica (1787) he has a long paper "Sur le son des corps elastiques," in Bernoulli and Hindenburg's Magazin (1787-1788) he treats of the roots of equation and of parallel lines; and in Hindenburg's Archiv (1798-1799) he writes on optics and perspective.

This expression for the intensity becomes rigorously applicable when f is indefinitely great, so that ordinary optical aberration disappears.

Our investigations and estimates of resolving power have thus far proceeded upon the supposition that there are no optical imperfections, whether of the nature of,, a regular aberration or dependent upon irregularities of material and workmanship. In practice there will always be a certain aberration or error of phase, which we may also regard as the deviation of the actual wavesurface from its intended position.

The effect of aberration may be considered in two ways.

The results in the second case show that an increase of aperture up to that corresponding to an extreme aberration of half a period has no ill effect upon the central band (§ 3), but it increases unduly the intensity of one of the neighbouring lateral bands; and the practical conclusion is that the best results will be obtained from an aperture giving an extreme aberration of from a quarter to half a period, and that with an increased aperture aberration is not so much a direct cause of deterioration as an obstacle to the attainment of that improved definition which should accompany the increase of aperture.