| 释义 |
collimation
col·li·mate C0482000 (kŏl′ə-māt′)tr.v. col·li·mat·ed, col·li·mat·ing, col·li·mates 1. To make parallel; line up.2. To adjust the line of sight of (an optical device).
[New Latin collīmāre, collīmāt-, alteration of Latin collīneāre, to aim : com-, intensive pref.; see com- + līneāre, to make straight (from līnea, line; see line1).]
col′li·ma′tion n.Thesaurus| Noun | 1. | collimation - the accurate adjustment of the line of sight of a telescopereadjustment, adjustment, registration - the act of adjusting something to match a standard |
Translationscollimationcollimazioneколлимационныйколлимацияколлимированиеколлимированностьcollimation
collimation (kol-ă-may -shŏn) The alignment of the optical elements in a telescope. For a simple refractor the only adjustment required is to position the object lens at right angles to the optical axis by adjusting the screws on its supporting cell. In a simple Newtonian reflector the orientation of both the primary and diagonal mirrors must be adjusted, and the latter positioned correctly opposite the draw tube. Final small adjustments are then made to obtain bright star images as free as possible from coma.collimation
collimation [kol″ĭ-ma´shun] 1. in microscopy, the process of making light rays parallel; the adjustment or alignment of optical axes.2. in radiology, the elimination of the more divergent portion of an x-ray beam.3. in nuclear medicine, the use of a perforated absorber to restrict the field of view of a detector and reduce scatter.col·li·ma·tion (kol'i-mā'shŭn), 1. The method, in radiology, of restricting and confining the x-ray beam to a given area and, in nuclear medicine, of restricting the detection of emitted radiations from a given area of interest.
See also: laser, coherence. 2. A characteristic of laser light, in which all rays are nondivergent. The combination of collimation, coherence, and monochromatism produces, over a long distance, a bright, precise, finely focused beam.
See also: laser, coherence. [L. collineo, to direct in a straight line] collimation The process in which the spread of a beam or field of radiation is reduced with a lead diaphragm, tube, or cone.collimation Radiation physics The formal process in which a beam or field of radiation is reduced with a lead diaphragm, tube, or conecol·li·ma·tion (kol'i-mā'shŭn) 1. radiology The process of restricting and confining the x-ray beam to a given area. 2. nuclear medicine Restricting the detection of emitted radiations from a given area of interest. [L. collineo, to direct in a straight line]collimation 1. The making of a bundle of light rays parallel. 2. In radiography, limiting the size of the beam to the required region on the patient, thereby protecting the remainder of the patient from radiation.col·li·ma·tion (kol'i-mā'shŭn) The method, in radiology, of restricting and confining the x-ray beam to a given area and, in nuclear medicine, of restricting the detection of emitted radiations from a given area of interest. [L. collineo, to direct in a straight line]collimation
Words related to collimationnoun the accurate adjustment of the line of sight of a telescopeRelated Words- readjustment
- adjustment
- registration
|