Collimator
nounverified·updated May 18, 2026
optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens
Framework senses
- §1
- optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens
- §2
- a small telescope attached to a large telescope to use in setting the line of the larger one