LiDAR System
A LiDAR System is a remote sensing system that illuminates a target with a laser and measures distance using the reflected light.
- AKA: Light Detection and Ranging System.
- Context:
- It can (typically) operates by repeatedly changing the Wavelength of a Laser (so that the sensor can properly identify the light as it bounces off an object).
- It can range from being a 1-D LiDAR, 2-D LiDAR, 3-D LiDar.
- …
- Example(s):
- a Car Rooftop LiDAR.
- …
- Counter-Example(s):
- a Sonar.
- See: Remote Sensing, Laser, Radar, Geomatics, Autonomous Car, 3-D Scanning, Laser Scanning.
References
2020
- (Wikipedia, 2020) ⇒ https://en.wikipedia.org/wiki/Lidar Retrieved:2020-5-12.
- Lidar ('LIDAR, LiDAR, and LADAR) is a method for measuring distances (ranging) by illuminating the target with laser light and measuring the reflection with a sensor. Differences in laser return times and wavelengths can then be used to make digital 3-D representations of the target. It has terrestrial, airborne, and mobile applications.
The term lidar was originally a portmanteau of light and radar. It is now also used as an acronym of "light detection and ranging" and "laser imaging, detection, and ranging". Lidar sometimes is called 3-D laser scanning, a special combination of a 3-D scanning and laser scanning. Lidar is commonly used to make high-resolution maps, with applications in surveying, geodesy, geomatics, archaeology, geography, geology, geomorphology, seismology, forestry, atmospheric physics, laser guidance, airborne laser swath mapping (ALSM), and laser altimetry. The technology is also used in control and navigation for some autonomous cars.
- Lidar ('LIDAR, LiDAR, and LADAR) is a method for measuring distances (ranging) by illuminating the target with laser light and measuring the reflection with a sensor. Differences in laser return times and wavelengths can then be used to make digital 3-D representations of the target. It has terrestrial, airborne, and mobile applications.
2020
- https://wired.com/story/sleeker-lidar-moves-volvo-closer-selling-self-driving-car/
- QUOTE: ... Lidar systems shoot out millions of points of lights a second, measuring how long they take to return after bouncing off nearby objects to build a map of their surroundings. Because they rival cameras for detail without the tricky matter of converting 2D pixels into 3D understanding, nearly all self-driving developers consider them a must-have tool. …
2015
- http://www.wired.com/2015/09/laser-breakthrough-speed-rise-self-driving-cars/
- QUOTE: A LIDAR operates by repeatedly changing the wavelength of a laser, so that the sensor can properly identify the light as it bounces off an object and returns to the sensor, and such wavelength changes require the precise manipulation of a mirror — or sometimes multiple mirrors. Typically, a separate electrical device moves these mirrors to and fro.