What technology does lidar use?

Lidar is an acronym for “detection and range of light”. It is sometimes referred to as “laser scanning” or “3D scanning”. The technology uses eye-safe lasers to create a 3D representation of the studied environment. LiDAR is an acronym for Light Detection and Ranging.

In LiDAR, laser light is sent from a source (transmitter) and is reflected from objects in the scene. The system receiver detects reflected light and the time of flight (TOF) is used to develop a distance map of the objects in the scene. Virtually all manufacturers seeking autonomous driving consider LiDAR to be a key enabling technology, and some LiDAR systems are now available for advanced driver assistance systems (ADAS). Unlike mobile and static LiDAR systems that are installed in fixed structures, such as tripods, this type of LiDAR is prevalent in archaeology, topography, mining and engineering.

Topographic LIDAR usually uses a near-infrared laser to map the land, while bathymetric LIDAR uses green light that penetrates the water to also measure the elevations of the seabed and riverbeds. Nowadays, LiDAR is frequently used to create a three-dimensional model of the world surrounding the LiDAR sensor. In addition, topographic LiDAR uses a near-infrared laser to map terrain and buildings, and bathymetric LiDAR uses green light that penetrates water to map the seabed and riverbeds. With repeated pings, a LiDAR device can also learn how nearby objects move, their speed and whether they are facing the LiDAR device or not.

3D at Depth, a global provider of advanced subsea LiDAR solutions, has continued to validate the LiDAR market for the upstream oil and gas industry. LiDAR follows a simple principle: it throws laser light at an object on the Earth's surface and calculating the time it takes to return to the LiDAR source.

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