Rangefinder

A rangefinder is a device that measures distance from the observer to a target.

Some devices use active methods to measure (such as ultrasonic ranging module, laser rangefinder, radar distance measurement); others measure distance using trigonometry (stadiametric rangefinders and parallax, or coincidence rangefinders). Older methodologies that use a set of known information, usually distances or target sizes, to make the measurement, have been in regular use since the 18th century.

单词	Rangefinding
释义	Rangefinding 原声例句 PBS太空科学 Lunar rangefinding lasers fired from Earth at reflectors on the moon are over 6 kilometers wide by the time they hit. 从地球向月球反射器发射的月球测距激光在命中时已超过 6 公里宽。英语百科 Rangefinder A rangefinder is a device that measures distance from the observer to a target. Some devices use active methods to measure (such as ultrasonic ranging module, laser rangefinder, radar distance measurement); others measure distance using trigonometry (stadiametric rangefinders and parallax, or coincidence rangefinders). Older methodologies that use a set of known information, usually distances or target sizes, to make the measurement, have been in regular use since the 18th century.
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Rangefinding

Rangefinder