Lidar
Lidar is a method for measuring distances by using a laser on a target and measuring its reflection with a sensor.
History
After the invention of laser, first tool similar to a lidar was made in 1961 at Hughes Aircraft Company.[1] It was first intended to track satellites.[2] It was originally called "Colidar", acronym for "Coherent Light Detecting And Ranging".[3]
One of first usages of lidar were in meteorology. National Center for Atmospheric Research used it to measure clouds and pollution.[4]
Lidar Media
A frequency addition source of optical radiation (FASOR) used at the Starfire Optical Range for lidar and laser guide star experiments is tuned to the sodium D2a line and used to excite sodium atoms in the upper atmosphere.
Click image to see the animation. A basic lidar system involves a laser range finder reflected by a rotating mirror (top). The laser is scanned around the scene being digitized, in one or two dimensions (middle), gathering distance measurements at specified angle intervals (bottom).
Lidar scanning performed with a multicopter UAV
This mobile robot uses its lidar to construct a map and avoid obstacles.
Lidar is used to analyze yield rates on agricultural fields.
Cruise Automation self-driving car with five Velodyne Lidar units on the roof
Forecast 3-D Laser System using a SICK LMC lidar sensor
References
- ↑ "New Radar System". Odessa American. 28 Feb 1961.
- ↑ "COLIDAR". Journal of the American Society for Naval Engineers. 73 (4): 681–684. 2009-03-18. doi:10.1111/j.1559-3584.1961.tb03324.x.
- ↑ "COLIDAR - Coherent Light Detection and Ranging in Undefined by AcronymsAndSlang.com". acronymsandslang.com. Retrieved 2022-05-01.
- ↑ Goyer, G. G.; R. Watson (September 1963). "The Laser and its Application to Meteorology". Bulletin of the American Meteorological Society. 44 (9): 564–575 [568]. Bibcode:1963BAMS...44..564G. doi:10.1175/1520-0477-44.9.564.
