In optics, aberration is a property of optical systems, such as lenses, that causes light to be spread out over some region of space rather than focused...

chromatic aberration have different characteristics, and may occur together. Axial CA occurs throughout the image and is specified by optical engineers...

In optics, spherical aberration (SA) is a type of aberration found in optical systems that have elements with spherical surfaces. This phenomenon commonly...

the coma (/ˈkoʊmə/), or comatic aberration, in an optical system refers to aberration inherent to certain optical designs or due to imperfection in...

Defocus aberration, in which an image is out of focus Optical aberration, an imperfection in image formation by an optical system Relativistic aberration, the...

other optical system, suffers from a number of specific optical aberrations. The optical quality of the eye is limited by optical aberrations, diffraction...

third-order aberration, which occurs for objects (or parts of objects) away from the optical axis. This form of aberration occurs even when the optical system...

conditions. Simple lenses are subject to the optical aberrations discussed above. In many cases these aberrations can be compensated for to a great extent...

curvature, named for Joseph Petzval, describes the optical aberration in which a flat object normal to the optical axis (or a non-flat object past the hyperfocal...

straight lines in a scene remain straight in an image. It is a form of optical aberration. Although distortion can be irregular or follow many patterns, the...

(corrector plate) and mirror as primary optical elements, mainly used for wide field imaging without spherical aberration.[citation needed] The late 20th century...

unambiguous picture is provided by the optical transfer function. Optical systems, and in particular optical aberrations are not always rotationally symmetric...

curved mirrors, enabling it to minimize all three main optical aberrations – spherical aberration, coma, and astigmatism. This is primarily used to enable...

the time, ordinary soda-lime glass, was unable to compensate for optical aberrations. However, it evolved slowly over the centuries. It was first lightened...

opposite to where the rays entered. Ball lenses have extremely high optical aberration, including large amounts of coma and field curvature compared to conventional...

believed to be caused primarily by optical chromatic aberrations. Chromatic aberrations are defined as types of optical distortions that occur as a consequence...

In optics, defocus is the aberration in which an image is simply out of focus. This aberration is familiar to anyone who has used a camera, videocamera...

Hubble, or a number of non-optical telescopes) always work at their diffraction limit, if their design is free of optical aberration. The beam from a laser...

In astronomy, aberration (also referred to as astronomical aberration, stellar aberration, or velocity aberration) is a phenomenon where celestial objects...

actually true optical aberrations, as they do not represent or model curvature in the wavefront. Defocus is the lowest order true optical aberration. If piston...

atmospheric distortion, in microscopy, optical fabrication and in retinal imaging systems to reduce optical aberrations. Adaptive optics works by measuring...

a number of optical lens elements is required to correct (as much as possible) the many optical aberrations that arise. Some aberrations will be present...

suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for...

are called a stigmatic pair of the optical system. Many optical systems, even those exhibiting optical aberrations, including astigmatism, have at least...

consequently wider aberration-free field of view. Their designs can have simple all-spherical surfaces and can take advantage of a folded optical path that reduces...

of the fiber, and must not introduce aberrations in the beam. Aspheric lenses are typically used. At high optical intensities, above 2 megawatts per square...

lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths (typically red...

surface profile can reduce or eliminate spherical aberration and also reduce other optical aberrations such as astigmatism, compared to a simple lens. A...

have to be for these aberrations to be noticeable to the patient, the aberration occurring some distance away from the optical centre of the lens (off-axis)...

of a simple magnifying glass becomes poor due to optical aberrations, particularly spherical aberration. When more magnification or a better image is required...