The difference between lidar and ordinary radar

February 19, 2020

1.Traditional radar
Radar transmits electromagnetic energy into space in a directional manner. By receiving the radio waves reflected by an object in space, it can calculate the direction, height, and speed of the object, and can detect the shape of the object.
Radars can be divided into meter wave radar, decimeter wave radar, centimeter wave radar, millimeter wave radar, laser / infrared radar and so on according to the 'working wavelength'.
It can be seen that radar uses electromagnetic waves, and LiDAR is one of the radars (Note: To be more precise, lidar is one of the radars from a less strict perspective.
2.Lidar
Compared with traditional radars, lidar has become an advanced active telemetry tool with its precise time resolution, precise spatial resolution, and ultra-long detection distance. Its high-precision measurement function enables it to achieve precise ranging, Speed measurement, follow-up, detection, etc., have been widely used in civilian and military fields, and have broad development prospects. What is a light radar? A laser radar uses a laser beam as an information carrier, and uses phase, amplitude, and frequency to carry information, and raises the frequency of the radiation source to the optical frequency band, which can detect extremely small targets. It is a pre-treatment technology of modern optics, involving multiple disciplines of physics, combining the advantages of traditional heavy weight and modern lasers, and is an advanced technological product of active remote sensing.
What impact can lidar bring to people's lives? Lidar effectively combines laser optics and atmospheric optics, and harmonizes and integrates traditional street technologies such as radar, opto-mechatronics, and computing, which are useful in all major fields of physics Involved, is one of the cutting-edge applications of physics. At present, the lidar family is large and there are many classification standards. Due to its high resolution and sensitivity and strong anti-interference ability, it can realize real-time observation throughout the day. It can be widely used in environmental monitoring, terrain mapping, high-altitude detection, military applications, civilian Automotive and other fields.

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