| 释义 |
collimator
col·li·ma·tor C0482100 (kŏl′ə-mā′tər)n. A device capable of collimating radiation, as a long narrow tube in which strongly absorbing or reflecting walls permit only radiation traveling parallel to the tube axis to traverse the entire length.collimator (ˈkɒlɪˌmeɪtə) n1. (General Physics) a small telescope attached to a larger optical instrument as an aid in fixing its line of sight2. (General Physics) an optical system of lenses and slits producing a nondivergent beam of light, usually for use in spectroscopes3. (General Physics) any device for limiting the size and angle of spread of a beam of radiation or particlescol•li•ma•tor (ˈkɒl əˌmeɪ tər)
n. 1. a fixed telescope for use in collimating other instruments. 2. an optical system that transmits parallel rays of light. 3. a device for producing a particle beam in which all the particle paths are parallel. [1815–25] Thesaurus| Noun | 1. |  collimator - a small telescope attached to a large telescope to use in setting the line of the larger onetelescope, scope - a magnifier of images of distant objects | | 2. | collimator - optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens; light rays leave the slit as a parallel beamoptical device - a device for producing or controlling lightprism spectroscope, spectroscope - an optical instrument for spectrographic analysis |
Translationscollimatoreколлиматорколлиматорныйcollimator
collimator (kol -ă-may-ter) A device used to produce a parallel or near parallel beam of light or other radiation in an instrument. One example, used in spectroscopes, is a converging lens or mirror at whose focal point is a narrow slit upon which light is focused from behind.Collimator an optical device used to produce beams of parallel rays. A collimator consists of an objective lens or concave mirror in whose focal plane the illuminated object is placed. The opening of an opaque stop, such as a narrow slit of constant or adjustable width, is most commonly used for this purpose. The relative positions of the lens and the object are set by attaching them inside the body of the instrument, which is usually tubular. The blackened inner walls of the instrument’s body absorb rays whose direction does not coincide with the direction desired. The parallel nature of the beam emerging from a collimator is approximate. Rays emanating from one point of the object cannot be exactly mutually parallel because of diffraction and aberrations of the lens. The finiteness of the dimensions of the object results in the spreading of beams coming from various points on the object. The focal distance, the focal aperture, and the quality of correction of aberrations of the lens, as well as the shape and dimensions of the object, are selected according to the purpose of the collimator and the conditions of its use. Collimators are used in astronomy to align large measuring instruments and determine their collimation error, in spectral instruments to produce light beams that are directed into a dispersing system, and in various measuring, testing, and opticomechanical instruments used for alignment. They are part of autocollimating devices. collimator[′käl·ə‚mād·ər] (optics) An instrument which produces parallel rays of light. (physics) A device for confining the elements of a beam within an assigned solid angle. collimator
collimator [kol´ĭ-ma″ter] a diaphragm or system of diaphragms made of an absorbing material, designed to define and restrict the dimensions and direction of a beam of radiation.col·li·ma·tor (kol'i-mā'ter), A device of high absorption coefficient material used in collimation.col·li·ma·tor (kol'i-mā-tŏr) A device with blocks or jaws that restrict a beam of emitted radiation to a given area; composed of a high-absorption coefficient material such as lead or tungsten. collimator 1. A shield, shutter or cone, usually of lead, attached to an X-ray tube to limit the width of the beam. 2. A thick perforated lead plate designed to allow passage only of parallel radiation, as in a GAMMA CAMERA. collimator An optical apparatus for producing parallel rays of light. It usually consists of a positive achromatic lens, with an illuminated object (a slit, a graticule, a scale, etc.) placed at one of its focal points, so that light from any point on the object emerges from the collimator parallel.col·li·ma·tor (kol'i-mā-tŏr) A device of high absorption coefficient material used in collimation. collimator
Words related to collimatornoun a small telescope attached to a large telescope to use in setting the line of the larger oneRelated Wordsnoun optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lensRelated Words- optical device
- prism spectroscope
- spectroscope
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