collimator
/'kɒlimeitә/
📖 中文释义
- n. 准直仪
- [化] 准直管; 平行光管
📘 English Definition（英文释义）
- 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