verb. adjust the line of sight of (an optical instrument).
- line up
verb. make or place parallel to something.
Example sentences of the word collimate
1. Verb, base form
For use as laboratory sources, it's often valuable to collimate the light from an LED, to turn it into a "light beam."
2. Noun, singular or mass
If prism tilt is excessive, however, or lenses are misaligned, have a professional collimate your binoculars.