English collimator meaning in English  •  collimator का अर्थ अंग्रेजी में

Noun

• 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.