Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


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.


1. (General Physics) a small telescope attached to a larger optical instrument as an aid in fixing its line of sight
2. (General Physics) an optical system of lenses and slits producing a nondivergent beam of light, usually for use in spectroscopes
3. (General Physics) any device for limiting the size and angle of spread of a beam of radiation or particles


(ˈkɒl əˌmeɪ tər)

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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.collimator - a small telescope attached to a large telescope to use in setting the line of the larger onecollimator - a small telescope attached to a large telescope to use in setting the line of the larger one
telescope, 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 beam
optical device - a device for producing or controlling light
prism spectroscope, spectroscope - an optical instrument for spectrographic analysis
References in periodicals archive ?
The number of the "diurnal" cycles at clockwise rotation should be one less then numbers of collimator revolutions because of compensation of the Earth rotation.
The normalized root mean square errors decreased when the x-ray source intensity, integration time, collimator size, and number of scanning repetitions increased.
New workflow enhancements to the Symbia line of hybrid imagers include automatic and integrated collimator changing options, as well as an automatic quality control option that automates all daily, weekly and monthly quality control needs of the system.
Contract award: overhaul of the head and lu collimator incl.
LightPath Technologies is pleased to introduce the IsoBeam(TM) Fusion Collimator, an optically isolated, laser collimator.
The instrumental effects related to the use of a polycapillary x-ray lens as primary beam collimator are here studied and the features observed in the measurements modelled via Monte-Carlo ray-tracing.
To ensure reliable operation with high intensity heavy ion beams, a collimator, consisting of 60 Kollimatormodulen needed.
In radiosurgery, clinicians can define the amount, or dose, of radiation delivered during treatment using a collimator -- a metal radiation blocking device with an opening that dictates the shape and size of the radiation beam.
The first is the simplest, which is to match the collimator with the detector size.
High-energy accelerator Clinac 2300CD S / N 544 with the collimator wieloliostkowym Millennium MLC80, Portal Vision visualization system AS500, Exact therapeutic table, workstation Treat Varis and water-cooling systems and air conditioning / ventilation accelerator
has received FDA 510(k) clearance for a new high-definition multileaf collimator (MLC), an ultra-fine beam shaping device for radiosurgery.
Researchers can select a different multi-pinhole collimator configuration for each study and calibrate the scanner with a simple automated process.