The Collaborative International Dictionary
Collimate \Col"li*mate\, v. t. [imp. & p. p. Collimated; p. p. & vb. n. Collimating.] [See Collimation.] (Physics & Astron.) 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.
Collimating eyepiece, 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.
Collimating lens (Optics), a lens used for producing parallel rays of light.
Wiktionary
That collimates, or employs collimation v
(present participle of collimate English)
Usage examples of "collimating".
I took out the little collimating screws first, then I drew out the tube, and in that I found a brass plate screwed on the diaphragm which contained the lines.
Donors locked into Digen's system, shielding him from wild sensory inputs, collimating his inner flows, until the locked muscles began to melt loose and he drew a shuddering breath.