Definition of collimate in English:

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Pronunciation: /ˈkäləˌmāt/


[with object]
1Make (rays of light or particles) accurately parallel: (as adjective collimated) a collimated electron beam
More example sentences
  • The TPIAL emits a highly collimated beam of infrared light for precision aiming, as well as a separate infrared illumination beam with adjustable focus.
  • The excitation and transmitted light is collimated by a set of focusing lenses on either side of the sample chamber.
  • The first and second lenses operate jointly to concentrate and collimate the incident light beam.
1.1Accurately align (an optical or other system).
Example sentences
  • I have done this many times while collimating a telescope's optical alignment and checking for the circular diffraction rings that occur at the same distance in and out of focus.
  • Our SBC cavity incorporates a single collimating lens located a focal length away from a 1 - D array of laser emitters operating at different wavelengths, with the grating positioned another focal length away on the other side of the lens.
  • The helicopter's weapon sighting system is the PKV collimating sight.



Pronunciation: /käləˈmāSH(ə)n/
Example sentences
  • Even with the collimation provided by a parabolic sending station, my gut feeling is that the physics (scattering, signal-to-noise, etc) is very much against it working.
  • Most HRCT protocols use thin collimation (at intervals or continuously) from apices to costophrenic angles in the supine position with image reconstruction using an edge-enhancement algorithm.
  • All CT images were taken on subjects in the supine position with an HRCT scanner (X-Vigor; Toshiba, Tokyo, Japan), with 2-mm collimation according to the previously reported protocol.


Mid 19th century: from Latin collimare, an erroneous reading (in some editions of Cicero) of collineare 'align or aim', from col- 'together with' + linea 'line'.

For editors and proofreaders

Syllabification: col·li·mate

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