collimator length

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• Collimator — Example of a particle collimator A collimator is a device that narrows a beam of particles or waves. To narrow can mean either to cause the directions of motion to become more aligned in a specific direction (i.e., collimated or parallel) or to… …   Wikipedia

• collimator — /kol euh may teuhr/, n. 1. Optics. a. a fixed telescope for use in collimating other instruments. b. an optical system that transmits parallel rays of light, as the receiving lens or telescope of a spectroscope. 2. Physics. a device for producing …   Universalium

• Neutron Radiography — is the process by which film is exposed by first passing neutrons through an object to produce a visible image of the materials that make up the object. Primarily used in scientific investigations. Contents 1 Brief History of Neutron Imaging 2… …   Wikipedia

• Neutron imaging — Manual of Style …   Wikipedia

• Field of view (image processing) — The field of view of an imaging sensor or imaging system is defined as the maximum vertical and horizontal angular extent viewed by the sensor or system. Optical tests for measuring the FOV are versatile tests capable of measuring the FOV of UV,… …   Wikipedia

• telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… …   Universalium

• Energetic neutral atom — ENAs redirects here. For other uses, see Enas (disambiguation). Neutral Atom Imaging redirects here. For other uses, see Atom (disambiguation). ENA images of the fluctuation of Earth s ring current during July 15–16, 2000 geomagnetic storm made… …   Wikipedia

• Monochromator — in a x ray beamline at the Advanced Photon Source, Argonne National Laboratory. A monochromator is an optical device that transmits a mechanically selectable narrow band of wavelengths of light or other radiation chosen from a wider range of… …   Wikipedia

• Fresnel lens — A Fresnel lens (pronounced [ frɛz.nəl] or [freɪ nɛl] ) is a type of lens invented by French physicist Augustin Jean Fresnel. Originally developed for lighthouses, the design enables the construction of lenses of large aperture and short focal… …   Wikipedia

• Milkor MGL — MGL A U.S. Marine looks through the M2A1 reflex sight on a newly issued M32 MGL (MGL 140) in Iraq in 2006. Type Grenade launcher …   Wikipedia

• P-61 Black Widow — Infobox Aircraft name = P 61 Black Widow caption = A P 61A 1NO of 419th Night Fighter Squadron type = Night fighter national origin= United States manufacturer = Northrop designer = first flight = 26 May 1942 introduced = 1944 retired = 1952… …   Wikipedia