Heritage, George L. JBA Consulting, Warrington, Cheshire, United Kingdom.
Last reviewed:January 2020
- Simple rangefinders
- Coincidence rangefinders
- Stereoscopic rangefinders
- Errors with optical rangefinders
- Laser rangefinding
- Acoustic approaches
- Related Primary Literature
- Additional Reading
A device for measuring the distance, and potentially the relative position, of an object in relation to the observer. Rangefinding instruments have developed from early optical systems to include laser and acoustic devices. Instruments utilize simple trigonometry to resolve the internal angles created by the distant object and the two images of the object received at the instrument through two separate windows.
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