LiDAR, an acronym for Light Detection and Ranging, is a technology that uses laser light to measure the distance between objects in a scene. It works by emitting a laser from a source (transmitter) and measuring the time it takes for the light to return. This time of flight (TOF) is then used to generate a distance map of the objects in the scene. It is often referred to as a “pulsating laser” that measures the distance between the device and its surroundings. The distance is calculated using the speed of light and the time it takes for each laser pulse to return from an obstacle.
This pulsed laser measurement is used to create 3D models (also known as point clouds) and maps of objects and environments. LiDAR is also called 3D laser scanning, which works in a similar way to RADAR, but instead of radio waves, it emits fast laser signals of up to 160,000 pulses per second towards the object. The formula for calculating the precise distance of the object is shown below:Distance = Speed of Light x Time of FlightTopographic LiDAR usually uses a near-infrared laser to map land, while bathymetric LiDAR uses green light that penetrates water to measure elevations of seabed and riverbeds. Autonomous vehicles are increasingly using LiDAR instruments in their operations. In summary, LiDAR technology is an advanced tool that utilizes laser light to measure distances between objects in a scene. It works by sending out a laser from a source and measuring the time it takes for the light to return.
This time of flight is then used to generate a distance map of objects in the scene. The distance is calculated using the speed of light and the time it takes for each laser pulse to return from an obstacle. This pulsed laser measurement is used to create 3D models and maps of objects and environments. LiDAR technology has become increasingly popular in recent years due to its accuracy and efficiency. It has been used in various applications such as autonomous vehicles, topographic mapping, bathymetric mapping, and more.
With its ability to accurately measure distances between objects, LiDAR technology has revolutionized how we view our environment.
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