collimation

/ˌkɑlɪˈmeɪʃən/
noun
  1. The process of making rays of light or particles parallel, or the state of being aligned in an optical instrument.
    • The technician checked the collimation of the laser before the experiment.
    • Poor collimation can cause blurry photos in a camera lens.
    • Proper collimation is essential for a clear image through the telescope.
Antonyms
What does "collimation" mean? | whatsthatwordmean | whatsthatwordmean