collimator

• 一种光学装置，用于将光束或粒子束变为平行束，常用于望远镜、激光器和其他科学仪器中，以校准或引导光线方向。

A noun referring to an optical device that produces a parallel beam of light, often used in telescopes and other scientific instruments to align or direct light rays.

1. Telescope alignment toolC2formalscientific

   A small telescope attached to a larger telescope to assist in aligning the line of sight of the larger instrument.

   准直仪

   • The astronomer adjusted the collimator to ensure the main telescope was perfectly aligned.
   • Using a collimator, the technician calibrated the observatory's primary instrument.
   • The collimator's crosshairs helped center the target star.

2. Optical beam deviceC2formalscientific

   An optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other, with the slit positioned at the lens's focus, causing light rays to leave the slit as a parallel beam.

   准直器

   • The collimator produced a perfectly parallel beam of light for the experiment.
   • In the lab, the collimator was used to test the properties of the optical system.
   • The engineer aligned the collimator to ensure the light beam was collimated.