n-th focal point
41point — {{Roman}}I.{{/Roman}} noun 1 thing said as part of a discussion ADJECTIVE ▪ excellent, good, interesting, valid ▪ important ▪ minor ▪ …
42Point spread function — The point spread function (PSF) describes the response of an imaging system to a point source or point object. A related but more general term for the PSF is a system s impulse response. The PSF in many contexts can be thought of as the extended… …
43point focal — židinio taškas statusas T sritis fizika atitikmenys: angl. focal point; focus point vok. Brennpunkt, m; Fokalpunkt, m rus. фокальная точка, f; фокусная точка, f pranc. point focal, m …
44Focal cloud — A focal cloud is the collection of focal points of any imperfect lens,whether optical, electrostatic or electromagnetic. This includes Parabolic antennas and lens type reflective antennas of all kinds.In this focal cloud illustration, a perfect… …
45Focal Length — WikiV The distance from the focal point to the principal point of the lens. The focal length is usually measured in millimeters of the lens. Focal length is an indication of the lens capability to capture a wide angle of view or a narrow view of… …
46focal length — UK / US noun [countable] Word forms focal length : singular focal length plural focal lengths physics the distance from the centre of a lens or mirror to its focal point …
47focal distance — (of the eye) the distance between the lens and the point behind the lens at which light from a distant object is focused. In a normally sighted person the point of focus is on the retina, but in myopia (short sightedness) the focus is in front of …
48focal length — Optics. 1. the distance from a focal point of a lens or mirror to the corresponding principal plane. Symbol: f 2. the distance between an object lens and its corresponding focal plane in a telescope. Also called focal distance. [1745 55] * * * …
49focal — adj. of, at, or in terms of a focus. Phrases and idioms: focal distance (or length) the distance between the centre of a mirror or lens and its focus. focal plane the plane through the focus perpendicular to the axis of a mirror or lens. focal… …
50focal infection — noun bacterial infection limited to a specific organ or region especially one causing symptoms elsewhere • Hypernyms: ↑infection • Part Meronyms: ↑focus, ↑focal point, ↑nidus * * * noun : a persistent bacterial infection of some organ or region… …
