测距器是测定镜头与被摄景物之间的距离，调整光线聚焦点的装置。
介绍了光学测距器的功能和原理。
The principle and function of optical range finder are described.
本文主要介绍了一种简单实用的汽车防撞系统测距器的设计方法。
This paper introduces the design of a kind of simple and practicable vehicle anti-collision range finder.
他们通常在头盔右边有一个潜望镜测距器附件，与曼达洛头盔类似。
They commonly had a periscope rangefinder attachment on the right side of their helmets, similar to Mandalorian helmets.
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