parallel beam collimator

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• 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

• collimator — noun a) An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence. b) A similar device that produces a parallel beam of particles such as neutrons …   Wiktionary

• collimator — /ˈkɒləmeɪtə/ (say koluhmaytuh) noun 1. a small fixed telescope for use in collimating other instruments. 2. a. a device for obtaining a parallel beam of light, consisting of a tube containing a convex lens at one end and an adjustable slit at the …  

• collimator — n. 1 a device for producing a parallel beam of rays or radiation. 2 a small fixed telescope used for adjusting the line of sight of an astronomical telescope, etc …   Useful english dictionary

• Collimator — Col li*ma tor, n. 1. (Astron.) A telescope arranged and used to determine errors of collimation, both vertical and horizontal. Nichol. [1913 Webster] 2. (Optics) A tube having a convex lens at one end and at the other a small opening or slit… …   The Collaborative International Dictionary of English

• collimator — [käl′əmāt΄ər] n. [see COLLIMATE] 1. a small telescope with cross hairs at its focus, fixed to another telescope, surveying instrument, etc. for adjusting the line of sight 2. a device that causes a beam of radiation, as light, to move as parallel …   English World dictionary

• 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 — noun Date: 1865 1. a device for producing a beam of parallel rays (as of light) or for forming an infinitely distant virtual image that can be viewed without parallax 2. a device for obtaining a beam (as of particles) of limited cross section …   New Collegiate Dictionary

• collimator — col•li•ma•tor [[t]ˈkɒl əˌmeɪ tər[/t]] n. 1) opt a fixed telescope for use in collimating other instruments 2) an optical system that transmits parallel rays of light 3) phs a device for producing a particle beam in which all the particle paths… …   From formal English to slang

• External beam radiotherapy — otherwise known as teletherapy, is the most frequently used form of radiotherapy. The patient sits or lies on a couch and an external source of radiation is pointed at a particular part of the body. Kilovoltage (also known as Superficial or Deep) …   Wikipedia

• Mirror — looking glass redirects here. For other uses, see Looking Glass (disambiguation). This article is about wave reflectors (mainly, specular reflection of visible light). For other uses, see Mirror (disambiguation). A mirror, reflecting a vase A… …   Wikipedia