The invention provides a device and a method for automatically matching
laser radar receiving and transmitting optical axes. The device comprises an emergent light path, a receiving light path and a
data acquisition and control portion, an emergent
system comprises a
laser, a beam expanding
system, a plurality of reflecting mirrors and lenses,
laser light is emitted to air through the beam expanding
system, the lenses, the reflecting mirrors and an
optical antenna, a receiving system comprises a
telescope, echo signals sequentially pass an
optical fiber, the lenses, a
light filter and a photoelectric detection element, the photoelectric detection element is arranged at an input end of a
data acquisition system, and an output end of a
control system controls the
optical antenna with a high-accuracy
servo motor through a motor driving controller. The method automatically traces the echo signals by the aid of a program design two-dimensional
spiral scanning algorithm, uniaxial scanning and matrix scanning are performed to obtain the best emitting antenna position, so that an emitting antenna points to and receives collimation of the
optical axis of the
telescope, operators no longer need rich experience, and the method is simple and convenient to operate and high in feasibility.