Search results
Results from the WOW.Com Content Network
Lidar (/ ˈ l aɪ d ɑːr /, also LIDAR, an acronym of "light detection and ranging" [1] or "laser imaging, detection, and ranging" [2]) is a method for determining ranges by targeting an object or a surface with a laser and measuring the time for the reflected light to return to the receiver.
Jeremy Dunn (Laser Technology Inc.) developed a police lidar device in 1989, [3] and in 2004 10% of U.S. sales of traffic enforcement devices were lidar rising to 30% in 2006, [1] given the advantages of lidar it appears likely that the majority of current sales are lidar, although sophisticated radar units are still being sold.
Unlike RADAR which relies on doppler shifts to directly measure speed or LIDAR which relies on the principle of time-of-flight to calculate speed, VIDAR measures the speed of vehicles by means of tracking an object through vision cameras. High precision speed measurement can be achieved if stereoscopic vision techniques are used.
Time of flight of a light pulse reflecting off a target. A time-of-flight camera (ToF camera), also known as time-of-flight sensor (ToF sensor), is a range imaging camera system for measuring distances between the camera and the subject for each point of the image based on time-of-flight, the round trip time of an artificial light signal, as provided by a laser or an LED.
This lidar scanner may be used to scan buildings, rock formations, etc., to produce a 3D model. The lidar can aim its laser beam in a wide range: its head rotates horizontally, a mirror flips vertically. The laser beam is used to measure the distance to the first object on its path.
A range gate is an electronic circuit that selects signals within a given time period; the "gate" allows signals to pass through only within the selected time. The term is mostly used in radar, where range gates are used to select certain targets for further processing.
Page moved from LADAR to LIDAR. kiwiinapanic 11:37, 31 Dec 2003 (UTC) Lidar is the more general term. The distinction between lidar and ladar depends more on the nature of the target. Traditionally lidar has been used to refer to diffuse targets (eg atmospheric aerosols) while ladar has been used to refer to hard (ie solid) targets.
In the early 1990s, he initiated and guided 2D LADAR Lidar for long range ID. He had the vision to use the designator laser along with a near IR camera to identify objects at longer range at night than can be done with a thermal imager. [4] The 2D LADAR for long range ID that McManamon initiated, is now being deployed in the U.S. Air Force and ...