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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 ?
By eliminating the need for an external collimator lens, Mitsubishi Electric's new red LD is expected to lead to simpler optical designs, reduced sizes and lower costs for projectors.
You can make a perfectly good collimator in your home shop with little more than a saw and a hand drill.
This enhances the quality of the image, as the photons are channelled more accurately through the collimator to the detector and scatter is reduced.
In the 1980s, a universal rectangular collimator was developed for use with beam alignment devices to further reduce the dose to the patient.
The patented SharpBeam collimator technology remains a standard feature for all models.
Sets of detector heads, each one with a single pinhole collimator, and arranged surrounding the target, are an alternative to improve sensitivity, as a large set of projections is acquired simultaneously, while each detector head guarantees improved spatial resolution (8).
Just attach the device to the muzzle of your rifle and look through your scope, adjusting the reticle to match the grid pattern of the collimator.
The company's new CyberKnife M6 FIM and FM Systems, which features the InCise Multileaf Collimator, combines the benefits of beam shaping with the flexibility of non-isocentric, non-coplanar delivery offering unmatched clinical capabilities and expanding the number of patients eligible for treatment.
The Project: A multi-leaf collimator device needed to offer greater levels of accuracy than any similar product on the market.
But flawless protein crystals are difficult to grow and prepare for analysis, and existing collimator systems either cannot isolate the small, high-quality areas at all or cannot do so with sufficient precision to extract optimal data.
The XCP device has a collimator ring that is parallel with the film--holding plane of the x-ray film holder.