This form of LIDAR uses the elapsed time between the initial pulse, and ti's return to calculate the distance to the target object.
A device included on many direct vision cameras as an aid in focusing. It assesses subject distance (usually by comparing two images), and displays this information in the viewfinder. This device may be linked directly to the lens focus control, to give a coupled rangefinder (see Coupled rangefinder)
A camera equipped with a device that measures the distance from camera to subject for focusing.