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Laser F26

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Laser F26

Credit line: 
HRL Laboratories

Laser Rangefinder - Rifle-like Colidar Mark II fires a light beam from a laser at 186,000 miles per second to measure precise distances to targets instantaneously. The lightweight portable colidar (for Coherent Light Detection and Ranging) serves as an 'invisible tapemeasure' to pinpoint remote targets such as tanks. Engineer Rod Smith of Hughes Aircraft Company, Culver City, CA, which developed the device, prepares to fire laser light beam from long barrel. Telescope (shorter barrel) receives the light reflected back from a target and a timing circuit measures and indicates the distance by computing the light beam's elapsed time for the round trip.

Photo date: 
circa 1963