transitive verb. To make parallel; line up.

transitive verb. To adjust the line of sight of (an optical device).

To bring into the same line, as the axes of two lenses or the telescope of an optical instrument; also, to make parallel, as the rays of light passing through a lens.

To render the line passing through the optical center of the object-glass of a telescope and the middle wire of its reticule strictly perpendicular (or sometimes parallel) to the axis on which the telescope turns: usually by the aid of a collimator, or of star-observations in reversed positions of the instrument.

transitive verb. To render parallel to a certain line or direction; to bring into the same line, as the axes of telescopes, etc.; to render parallel, as rays of light.

transitive verb. an eyepiece with a diagonal reflector for illumination, used to determine the error of collimation in a transit instrument by observing the image of a cross wire reflected from mercury, and comparing its position in the field with that of the same wire seen directly.

transitive verb. a lens used for producing parallel rays of light.

verb. To focus into a narrow beam or column.

verb. make or place parallel to something

verb. adjust the line of sight of (an optical instrument)

"A slight vacuum is pulled behind an aluminized mylar plastic film to create a very large convex mirror to collimate the visual system in many aircraft simulators."

collimated  collimating  

adjust  align  aline  alter  change  

align  

collimated  collimates  collimating