Laser radar device based on split lens and detection system

The invention provides a laser radar device based on a split lens, which comprises a laser emitting device, an echo signal receiving device, a lens and a baffle, wherein the laser emitting device andthe echo signal receiving device are respectively disposed on two sides of the baffle; the baffle splits the lens to two half lenses; and one half lens is used as an emitting lens of the laser emitting device and the other half lens is used as a receiving lens of the echo receiving device. A split large-diameter half lens design is adopted, thereby realizing a high signal-to-noise ratio; a small interval exists between the emitting device and the receiving device, thereby reducing a detection blind area; the emitting device and the receiving device are completely optically isolated, thereby improving the detection sensitivity; collimation and focusing of an optical path are realized by using a small number of optical calibration components; due to the modular split design, the overall energy consumption is low, an