Definitions for "Collimator"
A telescope arranged and used to determine errors of collimation, both vertical and horizontal.
A tube having a convex lens at one end and at the other a small opening or slit which is at the principal focus of the lens, used for producing a beam of parallel rays; also, a lens so used.
Optical element which produces a light beam in which the rays are (at least very nearly) parallel.
A part of an instrument that selects the arrival direction of incoming particles or energy. Three collimators are in SEPICA, an instrument on the ACE spacecraft.
Keywords:  move, position
Move the position of the collimator