collimator
音標['k?limeit?] 讀音漢語翻譯
n. 準直儀
【化】 準直管; 平行光管
【醫】 準直儀, 平行光管
英文解釋：
名詞 collimator:
- a small telescope attached to a large telescope to use in setting the line of the larger one
- 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
詳細解釋：
col.li.ma.tor
n.（名詞）A device capable of collimating radiation, as a long narrow tube in which strongly absorbing or reflecting walls permit only radiation traveling parallel to the tube axis to traverse the entire length.準直儀，平行光管：一種能使射線成平行狀的儀器，如一個狹長試管的強烈吸收或反射的內壁，使得射線只有在和試管軸線相平行時才能穿過整個試管
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