focus: znaczenie i definicje

See focal length.

A point at which rays of light or other radiation converge or from which they appear to diverge, as after refraction or reflection in an optical system: the focus of a lens. Also called focal point.

The distinctness or clarity of an image rendered by an optical system.

The state of maximum distinctness or clarity of such an image: in focus; out of focus.

An apparatus used to adjust the focal length of an optical system in order to make an image distinct or clear: a camera with automatic focus.

A center of interest or activity. See Synonyms at center.

Close or narrow attention; concentration: "He was forever taken aback by [New York's] pervasive atmosphere of purposefulness—the tight focus of its drivers, the brisk intensity of its pedestrians” ( Anne Tyler).

A condition in which something can be clearly apprehended or perceived: couldn't get the problem into focus.

Pathology The region of a localized bodily infection or disease.

Geology The point of origin of an earthquake.

Mathematics A fixed point whose relationship with a directrix determines a conic section.

To cause (light rays, for example) to converge on or toward a central point; concentrate.

To render (an object or image) in clear outline or sharp detail by adjustment of one's vision or an optical device; bring into focus.

To adjust (a lens, for example) to produce a clear image.

To direct toward a particular point or purpose: focused all their attention on finding a solution to the problem.

To converge on or toward a central point of focus; be focused.

To adjust one's vision or an optical device so as to render a clear, distinct image.

To concentrate attention or energy: a campaign that focused on economic issues.