n-th focal point
61focal plane — The plane occupied by the film at the focal point of the lens. It can be positive or negative; it is commonly referred to as positive and negative planes, respectively. fog i. The meteorological condition in which the horizontal visibility at the …
62focal length — noun (C) technical the distance between the centre of a lens and the focal point …
63focal length — fo′cal length n. opt the distance from a focal point of a lens or mirror to the corresponding principal plane Also called fo′cal dis tance …
64focal plane — fo′cal plane n. opt a plane through a focal point and perpendicular to the axis of a lens, mirror, or other optical system • Etymology: 1890–95 …
65focal plane — /ˈfoʊkəl pleɪn/ (say fohkuhl playn) noun 1. the plane normal to the principal axis of a lens (or system of lenses) or a mirror, which passes through the focal point. 2. the plane in which light rays from an external object are focused in a camera …
66focal — focal, ale, aux [ fɔkal, o ] adj. et n. f. • 1812; du lat. focus « foyer » 1 ♦ Phys. Qui concerne le foyer, les foyers d un instrument d optique. ⇒ bifocal. Axe focal, plan focal. N. f. Distance focale. Objectif à focale variable. ⇒ zoom. 2 ♦… …
67FOCAL (programming language) — FOCAL, (abbreviation of FOrmula CALculator), is an interpreted programming language resembling JOSS.Largely the creation of Richard Merrill, FOCAL was initially written for and had its largest impact on the Digital Equipment Corporation s (DEC s) …
68FOCAL-69 — was the landmark version of the FOCAL programming language, more widely publicized than the original version of the language created in 1968. FOCAL 69, created by Richard Merrill is important because: * It was the basis for all later derivatives… …
69Point focal — Point de Schelling Le point de Schelling ou point focal est, en théorie des jeux mais sans qu il y ait forcément de rivalité une solution à laquelle les participants à un jeu de « coordination pure » qui ne peuvent pas communiquer entre …
70Point Charles Light — Point Charles Light, view from sea …
