[The Tech][overview][next]
Time of Flight

A laser bouncing off a target. To measure a distance using time of flight, shoot a laser beam at an object and wait until it returns to the location of the laser. The speed that photons travel in air is constant for all photons - about 670 million miles per hour. Because we know the constant speed of light, it is possible to determine distances by bouncing a laser beam off a target and measuring the time it takes to return.