- central aperture
- centrale opening
English-Dutch technical dictionary. 2013.
central aperture
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aperture — 1. An inlet or entrance to a cavity or channel. in anatomy, an open gap or hole. SEE ALSO: fossa, ostium, orifice, pore. 2. The diameter of the objective of a microscope. SYN … Medical dictionary
Numerical aperture — The numerical aperture with respect to a point P depends on the half angle θ of the maximum cone of light that can enter or exit the lens. In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes… … Wikipedia
Very-small-aperture terminal — A 2.5 m parabolic dish antenna for bidirectional satellite Internet access A very small aperture terminal (VSAT), is a two way satellite ground station or a stabilized maritime Vsat antenna with a dish antenna that is smaller than 3 meters. The… … Wikipedia
Very small aperture terminal — A Very Small Aperture Terminal (VSAT), is a two way satellite ground station with a dish antenna that is smaller than 3 meters (most VSAT antennas range from 75 cm to 1.2 m). VSAT data rates typically range from narrowband up to 4 Mbit/s. VSATs… … Wikipedia
Median aperture — Brain: Median aperture Scheme of roof of fourth ventricle. The arrow is in the foramen of Magendie. Latin apertura mediana ventriculi quarti Gray s … Wikipedia
Microwave Imaging Radiometer with Aperture Synthesis — (MIRAS) is the major instrument on the Soil Moisture and Ocean Salinity satellite (SMOS). MIRAS is a planar antenna composed of a central body (the so called hub) and three telescoping, deployable arms, in total 69 receivers on the Unit. Each… … Wikipedia
Child with Toy Hand Grenade in Central Park — Diane Arbus Child with Toy Hand Grenade in Central Park, New York City (1962) Child with Toy Hand Grenade in Central Park, New York City, USA (1962) is a famous photograph by Diane Arbus. The photo shows a boy, with the left strap of his jumper… … Wikipedia
microscope — /muy kreuh skohp /, n. 1. an optical instrument having a magnifying lens or a combination of lenses for inspecting objects too small to be seen or too small to be seen distinctly and in detail by the unaided eye. 2. (cap.) Astron. the… … Universalium
Diaphragm (optics) — A 35 mm lens set to f/8; the diameter of the seven sided entrance pupil, the virtual image of the opening in the iris diaphragm, is 4.375 mm In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center. The role of… … Wikipedia
art and architecture, Oceanic — ▪ visual arts Introduction the visual art (art) and architecture of native Oceania, including media such as sculpture, pottery, rock art, basketry, masks, painting, and personal decoration. In these cultures, art and architecture have often … Universalium
iris diaphragm — noun diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening • Syn: ↑iris • Hypernyms: ↑diaphragm, ↑stop * * * noun : an adjustable diaphragm of thin opaque plates that can be turned by a… … Useful english dictionary
