Focus (optics)
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geometrical optics, a focus, also called an image point, is a point where light rays originating from a point on the object converge. Although the focus is conceptually...- packaging Epileptic focus in epilepsy Focus (earthquake), an earthquake's underground point of origin or hypocenter Focus (optics), a point toward which...
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments...- X-ray optics is the branch of optics that manipulates X-rays instead of visible light. It deals with focusing and other ways of manipulating the X-ray...
only fully valid in geometrical optics, not in Gaussian beam optics or in wave optics, where the wavefront at the focus is wavelength-dependent and the...- point in Wiktionary, the free dictionary. Focal point may refer to: Focus (optics) Focus (geometry) Conjugate points, also called focal points Focal point...
photo-polymerization. Filament propagation Cumberbatch, E. (1970). "Self-focusing in Non-linear Optics". IMA Journal of Applied Mathematics. 6 (3): 250–62. doi:10...- SPIE (redirect from International Society for Optics and Photonics)Engineers) is an international not-for-profit professional society for optics and photonics technology, founded in 1955. It organizes technical conferences...
In optics, a caustic or caustic network is the envelope of light rays which have been reflected or refracted by a curved surface or object, or the projection...
In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center. The role of the diaphragm is to stop the passage of light,...
X-ray telescope (section Optics)rockets, and satellites. The basic elements of the telescope are the optics (focusing or collimating), that collects the radiation entering the telescope...
is a small circular hole, as could be made with the point of a pin. In optics, pinholes with diameter between a few micrometers and a hundred micrometers...- Geometrical optics, or ray optics, is a model of optics that describes light propagation in terms of rays. The ray in geometrical optics is an abstraction...
Adaptive optics (AO) is a technique of precisely deforming a mirror in order to compensate for light distortion. It is used in astronomical telescopes...
In optics and photography, infinity focus is the state where a lens or other optical system forms an image of an object an infinite distance away. This...- Depth of focus is a lens optics concept that measures the tolerance of placement of the image plane (the film plane in a camera) in relation to the lens...
Nonlinear optics (NLO) is the branch of optics that describes the behaviour of light in nonlinear media, that is, media in which the polarization density...- optical waveguides can be described using the concepts of geometrical or ray optics, as illustrated in the diagram. Light passing into a medium with higher...
- The angle of incidence, in geometric optics, is the angle between a ray incident on a surface and the line perpendicular (at 90 degree angle) to the surface...
Chromatic aberration (category Geometrical optics)In optics, chromatic aberration (CA), also called chromatic distortion and spherochromatism, is a failure of a lens to focus all colors to the same point...
- Elementary Treatise on Optics by Henry Coddington REFLEXION AT CURVED SURFACES NOT SPHERICAL. 2943830An Elementary Treatise on Optics — REFLEXION AT CURVED
- geometrical optics in the Greco-Roman world. The word optics is derived from the Greek term τα ὀπτικά meaning "appearance or look". Optics was significantly
- these three goals, we take a pause here and study some principals that the optics work. The most primitive type of a telescope is a refracting telescope (also