Radar device

Provided in the utility model is a radar device comprising a convex lens, an imaging plate, and a processing unit. Specifically, the imaging plate that is arranged at a main optical axis of the convex lens is used for obtaining an image of a target object; the imaging plate is constantly perpendicularly to the main optical axis, the center of the imaging plate is constantly arranged at the main optical axis, and the imaging plate only can move along the main optical axis and can not rotate around the main optical axis; and the imaging plate is formed by a plurality of photosensitive sensors and one concave lens is arranged in front each of the photosensitive sensors. The processing unit, which is connected with the imaging plate, is used for determining the position, the size, the velocity magnitude and the velocity direction of the target object according to the target object on the imaging plate. The provided radar device is a target object tracking device with the advantages of high reliability, simple ope