The act of wandering; deviation, especially from truth or moral rectitude, from the natural state, or from a type.
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.
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.
An optical defect resulting from design or fabrication error, e.g., coma, distortion, curvature of field that prevents the lens from achieving precise focus.
see chromatic and spherical
Optical anomaly. The image of an object differs from the ideal figure. There are spherical Aberrations, Koma, etc.
(1) Something that prevents light from being brought into sharp focus, disenabling the formation of a clear image. (2) Lens flaw - the inability of a lens to reproduce an accurate, focused, sharp image.
the apparent angular displacement of the observed position of a celestial object from its geometric position, caused by the finite velocity of light in combination with the motions of the observer and of the observed object. (See aberration, planetary).
Blurred or distorted image quality that results from inherent physical properties (shape, curvature, density) of an optical device such as a lens or prism.
One of a number of optical distortions produced by an optical instrument, caused not by a defect in the instrument, but by the nature of its design, and the laws of optical physics.
All lenses suffer from various forms of Aberration which effect the final image. These include; Chromatic Coma Spherical Astigmatism Flare Pin Cushion & Barrel distortion Lenses are optimised to minimise most of these aberrations but will general suffer some more than others. Aberration effects can also be used for creative ends.
Visual error caused by the eye lens resulting in imperfect image
an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
a departure of an image-forming optical system from ideal behavior
an optical defect which causes a degradation in image quality
a flaw in a mirror or lens causing rays of light from a single point to fail to focus at a single spot in space
Any of several optical defects present in lenses. Current lenses are generally of very good quality and most will produce fine images, with little noticable defects.
An optical effect which degrades an image.
Individual deviation of the entire optical system from the standard
An optical effect due to the earth's orbital motion relative to light from a stellar source.
This is the inability of the camera lens to produce a true image. There is no such thing as a ‘perfect lens', generally the more expensive the lens the less aberrations there are in the picture quality.
An imperfection in a lens or optical system which prevents a point focus.
Imperfect lenses will give chromatic aberration (splitting of the light) or spherical aberration (curved image) which are the main types but there are also coma, astigmatism and distortion types.
A broad term covering several types of image defects in a lens or lens system.
An effect which distorts the final image in a telescope. See spherical aberration and chromatic aberration.
Factors in an optical system that generate adverse effect on the resultative image. Any design work in making optics entails many different approaches to correct various aberrations, such as spherical and chromatic aberrations, astigmatism, comatic flare, and distortion.
Variations in focus of a laser beam spot, resulting in the beam of light being diffused at different points, is called an aberration. These aberrations, caused by a lens or variations in substrate density, can create focusing errors in the laser pick-up. The thinner 0.6mm substrate utilized on DVD discs significantly reduces aberrations of the laser spot pick-up, improving accuracy in a high density environment.
Lens flaw that causes unsharp images. There are six types of aberrations: spherical, coma, astigmatism, curvature of field, distortion and chromatic.
in optics, an imperfect focus caused when a mirror or lens fails to bring light to a sharp focus
In an optical system, any departure from a spherically converging final wave front.
Term used in optics. This refers to anything which affects the fidelity of an image in respect to the original scene.
Property of an optical system that causes an image to have certain easily recognisable flaws. Aberrations are caused by geometrical factors such as the shapes of surfaces, their spacing, and alignments. Image problems caused by factors such as scratches or contamination are not called aberrations.
A term from optics that refers to anything affecting the fidelity of the image in regards to the original scene.
The imperfection of an optical device (like a lens). Aberrations include astigmatism and chromatic (prism like color separation).
This is the failing in the ability of a lens to produce a true optical representation of the image. Generally, the more expensive the lens, the less its aberrations.
In geometrical optics, deviation of light from traversing paths predicted by ray tracing or by the basic mathematical analysis that is used in developing ray tracing programs.
the inability of a lens to produce a perfect, sharp image, especially towards the edge of the lens field. These faults can be reduced by compound lens constructions, and the use of small apertures.
An irregularity or departure from the norm. In this context, an imperfection in the eye affecting vision.
n. Deviation from a right, customary, or prescribed course.
Geometric deviation of an image formed by an imaging grating from the ideal point image.
An optical defect in a lens causing the lens to form an image that is not sharp or that is distorted.
Any inherent deficiency of a lens or optical system which is responsible for imperfections in shape or sharpness of the image.
The inability of a lens to produce a perfect, sharp image, especially at the edge of the photo. (see Barrel distortion& Pincushion effect )
Deviation from what is normal, correct, or natural. In optics, aberrations may be defects in a lens system that cause its image to deviate from the rules of paraxial imagery. Learn more about Aberration...
The failure of an optical lens to produce an exact point-to-point correspondence between the object and its resulting image. Various types are chromatic, spherical, coma, astigmatism and distortion.
A deviation or irregularity. In this case, it refers to a visual aberration, or a deviation from normal vision. It is the failure of a refracting surface or lens to bring all rays from an object point toward a desired image point. This can result in image blur. Aberration also results in curvature in the image of a straight line. It may be inherent in the lens design or may result from an error in processing.
The inability of a lens to produce a true image, particularly at the edge of a photograph. Usually, the more expensive the lens, the better its optical quality and the fewer aberrations.
Any optical defect that causes light to deviate from reaching the focal point of a lens, therefore reducing the quality of the image.
In lenses, it is a failure to form a perfect image. Two important types of aberration in photography to avoid are spherical and chromatic.
A defect in the image forming capacity of a lens.
( in Optics)—In the refraction of light by a convex lens the rays passing through different parts of the lens are brought to a focus at slightly different distances,—this is called spherical aberration; at the same time the coloured rays are separated by the prismatic action of the lens and likewise brought to a focus at different distances, this is chromatic aberration.
defect of an optical instrument in the formation of images; the defect occurs when the light source is not monochromatic, when it is situated off the axis of the optical system, or when its aperture is large. It is possible to partly correct the aberrations by using special artifices.
An inherent flaw - or deviation from a theoretical ideal - in a lens which leads to a degradation of some aspect of image quality. The most common forms are spherical aberration, coma, astigmatism, curvature of field, curvilinear distortion (barrel and pincushion) and chromatic aberration. The first five of these aberrations are monochromatic and known as Seidel aberrations. Chromatic aberration comes in two forms and involves colour light. Scratches and dirt on the lens do not cause aberrations - the phenomena result intrinsically from the lens design. No real life lens can ever be entirely free of all these aberrations, but lens designers strive to minimize them given the target cost of the product. Note that some of these aberrations can be reduced by stopping down the lens (notably spherical aberration, curvature of field and coma) but others are not affected.
A distortion of an image produced by a faulty lens or mirror.
A lens flaw that produces degraded sharpness, lowered contrast, distorted shape or other imperfections in photographs.
This refers to color smudges and distortions of an image. This can be compensated for by combining multiple lenses.
Any undesired factor that distorts an image. Typical sources of image aberrations are noise, signal crosstalk, external signal pickup; optical effects such as chromatic aberration, vignetting, video effects such as barrel distortion, pin cushion; digitizing effects such as pixel clock crosstalk, video leveling, inadequate sampling, etc.