glass aperture
1Aperture — Ap er*ture (?; 135), n. [L. apertura, fr. aperire. See {Aperient}.] 1. The act of opening. [Obs.] [1913 Webster] 2. An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall. [1913 Webster] An… …
2Aperture grille — An aperture grille (tension mask) is one of two major technologies used to manufacture color cathode ray tube (CRT) televisions and computer displays; the other is shadow mask.Fine vertical wires behind the front glass of the display screen… …
3Ground glass — is glass whose surface has been ground to produce a flat but rough (matte) finish. A sheet of ground glass is used for the manual focusing of both still and motion picture cameras.Some cameras have no separate viewfinder, but instead use a piece… …
4half-hour glass — Hourglass Hour glass , n. An instrument for measuring time, especially the interval of an hour. It consists of a glass vessel having two compartments, from the uppermost of which a quantity of sand, water, or mercury occupies an hour in running… …
5half-minute glass — Hourglass Hour glass , n. An instrument for measuring time, especially the interval of an hour. It consists of a glass vessel having two compartments, from the uppermost of which a quantity of sand, water, or mercury occupies an hour in running… …
6Mouth glass — Mouth Mouth (mouth), n.; pl. {Mouths} (mou[th]z). [OE. mouth, mu[thorn], AS. m[=u][eth]; akin to D. mond, OS. m[=u][eth], G. mund, Icel. mu[eth]r, munnr, Sw. mun, Dan. mund, Goth. mun[thorn]s, and possibly L. mentum chin; or cf. D. muil mouth,… …
7three-minute glass — Hourglass Hour glass , n. An instrument for measuring time, especially the interval of an hour. It consists of a glass vessel having two compartments, from the uppermost of which a quantity of sand, water, or mercury occupies an hour in running… …
8Lens [object(ive) glass, relative] aperture — Относительное отверстие объектива …
9optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… …
10Optical aberration — v · d · e Optical aberration …
