collimator

1. n. A telescope arranged and used to determine errors of collimation, both vertical and horizontal. Source: opted

2. n. 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. Source: opted

3. n. a small telescope attached to a large telescope to use in setting the line of the larger one Source: wordnet

4. n. 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; light rays leave the slit as a parallel beam Source: wordnet

5. 1. (Astron.) A telescope arranged and used to determine errors of collimation, both vertical and horizontal. Nichol. 2. (Optics) 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. Source: webster

6. A telescope arranged and used to determine errors ofcollimation, both vertical and horizontal. Nichol. Source: adambom

7. n:100 n. a small telescope attached to a large telescope to use in setting the line of the larger one n. 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; light rays leave the slit as a parallel beam Source: ecdict

Thesaurus links